{"title":"40mm Dynamic Blocks","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eAllen 40mm dynamic blocks are made from high-strength, lightweight glass-loaded nylon and feature dynamic bearings. The result is a high-performance block range suitable for keelboats and dinghies.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"single-with-swivel-head","title":"40mm Single Dynamic Block","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Swivel Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e360° swivel head\u003c\/strong\u003e ensures the block aligns naturally with changing load directions, providing smooth operation and reducing line twist.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003eShackle is load-rated higher than the block for added reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Central Becket Hole\u003c\/strong\u003e for use as a tie-off point in purchase systems\u003c\/li\u003e\n\u003cli\u003eSpecific becket variations are also available\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance for smooth operation under load\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eSuitable for applications requiring efficient line management and unrestricted block rotation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752044407,"sku":"A20401","price":38.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401.jpg?v=1781800399"},{"product_id":"single-with-77-cleat","title":"40mm Single Dynamic Block - Cleat","description":"\u003ch3\u003e40mm Single Dynamic Block With A..77 Cleat\u003c\/h3\u003e\n\u003cp\u003eThe 40mm Single Dynamic Block With A..77 Cleat is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003eball bearing cam cleat (A..77)\u003c\/strong\u003e is mounted on an adjustable stainless-steel arm, allowing the cleat angle to be tailored to suit the application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Ball Bearing Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm\u003c\/li\u003e\n\u003cli\u003eCleat angle can be easily adjusted to suit different installations and line lead angles\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eIdeal for applications requiring both efficient line control and secure cleating in a compact package\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752306551,"sku":"A20401-77","price":92.07,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401-77-V2.jpg?v=1781800400"},{"product_id":"single-with-becket","title":"40mm Single Dynamic Block - Becket","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Block With Becket\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40m Single Dynamic Swivel Block With Becket\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003ebecket\u003c\/strong\u003e makes it ideal for creating compact purchase systems for mainsheet, cunningham, outhaul, and vang controls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752404855,"sku":"A20401B","price":40.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401B.jpg?v=1781800402"},{"product_id":"single-with-becket-and-77-cleat","title":"40mm Single Dynamic Block - Becket, Cleat","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Block With Becket \u0026amp; Cam Cleat\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Dynamic Single Swivel Block With Becket \u0026amp; Cam Cleat\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel head\u003c\/strong\u003e, \u003cstrong\u003eintegrated becket\u003c\/strong\u003e, and \u003cstrong\u003eadjustable cam cleat\u003c\/strong\u003e, this block is ideal for cunningham, outhaul, vang, and other purchase system applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Aluminium Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm for secure line holding and easy adjustment\u003c\/li\u003e\n\u003cli\u003eCleat angle can be adjusted by repositioning the arm to suit different installations and line lead angles\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Maximum working load is limited by the cam cleat rating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752535927,"sku":"A20401B-77","price":94.14,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401B-77-V2.jpg?v=1781800404"},{"product_id":"single-with-becket-and-fiddle","title":"40mm Single Dynamic Block - Becket, Fiddle","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Block With Becket \u0026amp; Fiddle\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Swivel Block With Becket \u0026amp; Fiddle\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel head\u003c\/strong\u003e, \u003cstrong\u003eintegrated becket\u003c\/strong\u003e, and \u003cstrong\u003efiddle sheave\u003c\/strong\u003e, this block is ideal for compact purchase systems used in cunningham, outhaul, vang, and other control line applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave for compact purchase systems\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, versatile solution for applications requiring both purchase and low-friction line control\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752634231,"sku":"A20401BF","price":57.39,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401BF.jpg?v=1781800405"},{"product_id":"single-with-becket-fiddle-and-77-cleat","title":"40mm Single Dynamic Block - Becket, Fiddle, Cleat","description":"\u003ch3\u003e40mm Single Dynamic Swivel Block With Becket, Fiddle \u0026amp; Cam Cleat\u003c\/h3\u003e\n\u003cp\u003eThe 40mm Single Dynamic Swivel Block With Becket, Fiddle \u0026amp; Cam Cleat is a versatile, high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen’s advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel head\u003c\/strong\u003e, \u003cstrong\u003eintegrated becket\u003c\/strong\u003e, \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e, and \u003cstrong\u003eadjustable cam cleat\u003c\/strong\u003e, this block is ideal for compact purchase systems used in cunningham, outhaul, vang, and other control line applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave and cam cleat\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Aluminium Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm for secure line holding and easy adjustment\u003c\/li\u003e\n\u003cli\u003eCleat angle can be adjusted to suit different sheeting positions and line lead angles\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, all-in-one solution for control systems requiring purchase, cleating, and low-friction performance\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196752765303,"sku":"A20401BF-77","price":109.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401BF-77-V2.jpg?v=1781800406"},{"product_id":"single-with-becket-fiddle-and-hook","title":"40mm Single Dynamic Block - Hook, Becket, Fiddle","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Hook Block With Becket \u0026amp; Fiddle\u003c\/h3\u003e\n\u003cp\u003eThe\u003cstrong\u003e \u003c\/strong\u003e40mm Single Dynamic Swivel Hook Block With Becket \u0026amp; Fiddle is a versatile, high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel hook head\u003c\/strong\u003e, \u003cstrong\u003eintegrated becket\u003c\/strong\u003e, and \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e, this block is ideal for compact purchase systems requiring quick attachment and removal.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave for compact purchase systems\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivelling Hook Head\u003c\/strong\u003e for quick attachment and removal\u003c\/li\u003e\n\u003cli\u003eIdeal for lightweight control systems requiring fast rigging changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, versatile solution for applications requiring purchase, low-friction performance, and easy attachment\/removal of the block\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196753060215,"sku":"A20401BFH","price":62.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401BFH.jpg?v=1781800407"},{"product_id":"single-with-becket-fiddle-hook-and-77-cleat","title":"40mm Single Dynamic Block - Becket, Fiddle, Hook, Cleat","description":"\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Hook Block With Becket, Fiddle \u0026amp; Cam Cleat\u003c\/h3\u003e\n\u003cp\u003eThe 40mm Single Dynamic Swivel Hook Block With Becket, Fiddle \u0026amp; Cam Cleat is a versatile, high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen’s advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel hook head\u003c\/strong\u003e, \u003cstrong\u003eintegrated becket\u003c\/strong\u003e, \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e, and \u003cstrong\u003eadjustable cam cleat\u003c\/strong\u003e, this block is ideal for compact purchase systems requiring quick attachment, smooth operation, and secure rope control.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave and cam cleat\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivelling Hook Head\u003c\/strong\u003e for quick attachment and removal\u003c\/li\u003e\n\u003cli\u003eIdeal for lightweight control systems requiring fast rigging changes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eIdeal for cunningham, outhaul, and vang control systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Aluminium Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm for secure line holding and easy adjustment\u003c\/li\u003e\n\u003cli\u003eCleat angle can be adjusted to suit different sheeting positions and line lead angles by loosening the centre fixing, repositioning the arm, and retightening\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, all-in-one solution for applications requiring purchase, cleating, low-friction performance, and rapid attachment or removal of the block\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196753158519,"sku":"A20401BFH-77","price":114.77,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401BFH-77.jpg?v=1781800409"},{"product_id":"single-cheek","title":"40mm Single Dynamic Block - Cheek","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Cheek Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Cheek Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave cheek block for smooth and efficient line control\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003eFlat-mount cheek design with two fixing points for secure installation\u003c\/li\u003e\n\u003cli\u003eDomed head reduces the chance of lines snagging around the block\u003c\/li\u003e\n\u003cli\u003eCentral fixing point includes drainage holes to allow water to escape\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eIdeal for applications requiring efficient line routing and constant sheave movement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196753256823,"sku":"A20401C","price":35.54,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401C.jpg?v=1781800411"},{"product_id":"single-cheek-with-becket","title":"40mm Single Dynamic Block - Cheek, Becket","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Cheek Block With Becket\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Cheek Block With Becket\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe integrated \u003cstrong\u003ebecket\u003c\/strong\u003e allows the block to be used in compact purchase systems, making it ideal for a wide range of control line applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave cheek block for smooth and efficient line control\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003eFlat-mount cheek design with three fixing points for secure installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Becket\u003c\/strong\u003e for creating purchase systems and convenient tie-off points\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eIdeal for applications requiring efficient line routing and constant sheave movement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196753420663,"sku":"A20401CB","price":37.63,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401CB.jpg?v=1781800412"},{"product_id":"high-load-single-cheek","title":"40mm Single High Load Block - Cheek","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single High Load Cheek Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single High Load Cheek Block\u003c\/strong\u003e is designed for keelboats and dinghies, delivering smooth, efficient line handling in demanding applications. Manufactured from durable, lightweight glass-loaded nylon and fitted with a \u003cstrong\u003estainless-steel high-load sheave\u003c\/strong\u003e, it offers excellent performance with both rope and wire.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave cheek block for smooth and efficient line control\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Load Stainless-Steel Sheave\u003c\/strong\u003e for lower friction, faster rolling speeds, and improved durability\u003c\/li\u003e\n\u003cli\u003eSuitable for use with both rope and wire\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003eFlat-mount cheek design with two fixing points for secure installation\u003c\/li\u003e\n\u003cli\u003eDomed head reduces the chance of lines snagging around the block\u003c\/li\u003e\n\u003cli\u003eCentral fixing point includes drainage holes to allow water to escape\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable performance in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196753518967,"sku":"A20401CHL","price":54.85,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401CHL.jpg?v=1781800413"},{"product_id":"single-with-fiddle","title":"40mm Single Dynamic Block - Fiddle","description":"\u003cdiv\u003e\n\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Block With Fiddle\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Swivel Block With Fiddle\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. 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Manufactured from durable, lightweight glass-loaded nylon and featuring Allen’s advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel head\u003c\/strong\u003e, \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e, and \u003cstrong\u003eadjustable cam cleat\u003c\/strong\u003e, this block is ideal for compact purchase systems requiring smooth operation, efficient load handling, and secure rope control.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave and cam cleat\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Aluminium Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm for secure line holding and easy adjustment\u003c\/li\u003e\n\u003cli\u003eCleat angle can be adjusted to suit different sheeting positions and line lead angles by loosening the centre fixing, repositioning the arm, and retightening\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance across both sheaves\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eIdeal for control systems requiring purchase, cleating functionality, and efficient line management in a compact assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754076023,"sku":"A20401F-77","price":104.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401F-77-V2.jpg?v=1783072561"},{"product_id":"single-with-fiddle-and-hook","title":"40mm Single Dynamic Block - Hook, Fiddle","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Hook Block With Fiddle\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Swivel Hook Block With Fiddle\u003c\/strong\u003e is a versatile, high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe addition of a \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e and \u003cstrong\u003e360° swivel hook head\u003c\/strong\u003e makes this block ideal for compact purchase systems requiring quick attachment, smooth operation, and efficient load handling.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave for compact purchase systems\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivelling Hook Head\u003c\/strong\u003e for quick attachment and removal\u003c\/li\u003e\n\u003cli\u003eIdeal for lightweight control systems where fast rigging changes are required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance across both sheaves\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, versatile solution for applications requiring purchase, efficient line management, and easy attachment or removal of the block\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754207095,"sku":"A20401FH","price":56.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401FH.jpg?v=1781800417"},{"product_id":"single-with-fiddle-hook-and-77-cleat","title":"40mm Single Dynamic Block - Hook, Fiddle, Cleat","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Hook Block With Fiddle \u0026amp; Cam Cleat\u003c\/h3\u003e\n\u003cp\u003eThe 40mm Single Dynamic Swivel Hook Block With Fiddle \u0026amp; Cam Cleat is a versatile, high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen’s advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eCombining a \u003cstrong\u003eswivel hook head\u003c\/strong\u003e, \u003cstrong\u003e20mm fiddle sheave\u003c\/strong\u003e, and \u003cstrong\u003eadjustable cam cleat\u003c\/strong\u003e, this block is ideal for compact purchase systems requiring quick attachment, smooth operation, and secure rope control.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave block with integrated fiddle sheave and cam cleat\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivelling Hook Head\u003c\/strong\u003e for quick attachment and removal\u003c\/li\u003e\n\u003cli\u003eIdeal for lightweight control systems where fast rigging changes are required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20mm Dynamic Bearing Fiddle Sheave\u003c\/strong\u003e ensures smooth, efficient operation in multi-purchase systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.77 Aluminium Cam Cleat\u003c\/strong\u003e mounted on an adjustable stainless-steel arm for secure line holding and easy adjustment\u003c\/li\u003e\n\u003cli\u003eCleat angle can be adjusted to suit different sheeting positions and line lead angles by loosening the centre fixing, repositioning the arm, and retightening\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance across both sheaves\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eCompact, all-in-one solution for applications requiring purchase, cleating functionality, efficient line management, and easy attachment or removal of the block\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754305399,"sku":"A20401FH-77","price":109.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401FH-77.jpg?v=1781800419"},{"product_id":"single-with-hook","title":"40mm Single Dynamic Block - Hook","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Swivel Hook Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Swivel Hook Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e360° swivel hook head\u003c\/strong\u003e allows for quick attachment and removal, making it ideal for applications where blocks need to be rigged or removed rapidly.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivelling Hook Head\u003c\/strong\u003e for quick attachment and removal\u003c\/li\u003e\n\u003cli\u003eIdeal for lightweight control systems where fast rigging changes are required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Central Becket Hole\u003c\/strong\u003e for use as a tie-off point in purchase systems\u003c\/li\u003e\n\u003cli\u003eSpecific becket variations are also available\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance for smooth operation under load\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003eSuitable for applications requiring efficient line management and flexible attachment options\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754469239,"sku":"A20401H","price":43.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401H.jpg?v=1781800420"},{"product_id":"high-load-single","title":"40mm Single High Load Block","description":"\u003ch3\u003e40mm Single High Load Swivel Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single High Load Swivel Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eFitted with a \u003cstrong\u003estainless-steel high-load sheave\u003c\/strong\u003e, this version offers faster rolling speeds, lower friction, and compatibility with both rope and wire.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Load Stainless-Steel Sheave\u003c\/strong\u003e for lower friction, faster rolling speeds, and improved durability\u003c\/li\u003e\n\u003cli\u003eSuitable for use with both rope and wire\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e360° Swivel Head\u003c\/strong\u003e fitted with a 4mm shackle for flexible attachment and optimal load alignment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Central Becket Hole\u003c\/strong\u003e for use as a tie-off point in purchase systems\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth, reliable performance in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754731383,"sku":"A20401HL","price":59.18,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401HL.jpg?v=1781800421"},{"product_id":"single-with-strap","title":"40mm Single Dynamic Block - Strap","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Ultra-Strap Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Ultra-Strap Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eUltra-Strap\u003c\/strong\u003e attachment provides exceptional strength and durability while remaining rope-friendly, making it an excellent choice for dinghy jib and mainsheet systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave design for smooth and efficient line handling\u003c\/li\u003e\n\u003cli\u003eManufactured from durable, lightweight glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet, jib sheet, spinnaker sheet, and keelboat control line applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced rolling performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Strap Technology\u003c\/strong\u003e provides exceptional strength, durability, and rope-friendly performance\u003c\/li\u003e\n\u003cli\u003eCoined Ultra-Strap construction improves reliability and wear resistance compared to conventional strap designs\u003c\/li\u003e\n\u003cli\u003eIdeal for dinghy jib and mainsheet systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge Central Becket Hole\u003c\/strong\u003e for use as a tie-off point in purchase systems\u003c\/li\u003e\n\u003cli\u003eSpecific becket variations are also available\u003c\/li\u003e\n\u003cli\u003eLow-friction, fast-rolling performance for efficient control line management\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable performance in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754862455,"sku":"A20401S","price":33.74,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401S.jpg?v=1781800423"},{"product_id":"40-30mm-linked-singles","title":"40 \u0026 30mm Single Dynamic Blocks - Linked","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm \u0026amp; 30mm Dynamic Linked Single Blocks\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm \u0026amp; 30mm Dynamic Linked Single Blocks\u003c\/strong\u003e combine a 40mm and 30mm Dynamic Block in a compact linked assembly, providing an efficient solution for mainsheet, traveller, and control line systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLinked \u003cstrong\u003e40mm and 30mm Dynamic Blocks\u003c\/strong\u003e for compact, efficient rigging setups\u003c\/li\u003e\n\u003cli\u003eIdeal for mainsheet systems requiring a traveller block and mainsheet block mounted close together\u003c\/li\u003e\n\u003cli\u003eSuitable for mainsheet, spinnaker, pole launcher, and control line applications\u003c\/li\u003e\n\u003cli\u003eReduces the chance of snagging and simplifies system layouts\u003c\/li\u003e\n\u003cli\u003eManufactured from lightweight, high-strength glass-loaded nylon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eCaged ball bearings for reduced friction and enhanced performance\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm block features a large central hole\u003c\/strong\u003e that can be used as a becket (tie-off point)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note:\u003c\/strong\u003e Maximum working load is rated to the \u003cstrong\u003eA2030 (30mm) block\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196754927991,"sku":"A20401S-2030","price":50.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A20401S-2030.jpg?v=1781800424"},{"product_id":"single-with-lacing-eye-and-spring","title":"40mm Single Dynamic Block - Stand Up","description":"\u003cdiv\u003e\n\u003ch3\u003e40mm Single Dynamic Stand Up Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e40mm Single Dynamic Stand Up Block\u003c\/strong\u003e is a high-performance pulley designed for keelboats and dinghies. 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Well, now you can with the new Tii-Lock-40. Tii-Lock-40 is a small T shaped plastic moulding which fits perfectly into the central hole of our 40mm Tii-on Block. It allows for a continuous spliced loop to be locked into place, with no chance of it shaking free. The new concept was developed to give a quick, easy and strong option for attaching the A2040Tii block to either the boom or deck of a boat. The Tii-Lock-40 also makes replacing the blocks on the RS Aero boom really straightforward.\u003c\/p\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196870271351,"sku":"ATII-LOCK-40","price":3.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/ATii20lock-1.jpg?v=1781801543"}],"url":"https:\/\/allenbrothers.co.uk\/collections\/40mm-dynamic-blocks.oembed","provider":"Allen | Performance Sailing Hardware","version":"1.0","type":"link"}