Dynamic A2040 40mm Allen Pulley

40mm Dynamic Single Block. Dynamic A2040 40mm Allen block The 40mm single block is our go - to mainsheet block. Also ideal for dinghy jib and spinnaker sheet systems and keelboat control lines. Constructed with a lightweight composite cheek, Ultra - Strap and Dynamic rope - matched bearings. Bearings - Dynamic Blocks feature our patented bearing system that uses two rows of stainless steel ball bearings running on a stainless steel track. This offers superior load capacity and longevity compared to other bearing systems that run on a plastic rail. Becket - The 40mm range has a large central hole, which is designed to be used as a ringot (attachment point). The 40mm Single block is our go - to dinghy mainsheet block. Also ideal for dinghy jib and spinnaker sheeting systems as well as keelboat control lines. Built with a lightweight composite cheek, rope friendly Ultra - Strap and Dynamic bearings Bearings - Dynamic Blocks feature our patented bearing system which uses twin rows of stainless - steel ball bearings running on a stainless - steel rail. This provides a superior load - carrying ability and longevity when compared to other bearing systems which run on a plastic rail. Ultra - Strap - Our patented Ultra - Strap is used in our 20, 30 & 40mm Dynamic blocks. The Ultra - Strap is unique when compared to other designs because of its coining process. This process strengthens the strap, making it more reliable and hard - wearing as well as making it much more rope friendly than other designs. The Ultra - Strap was the first marine industry block designed to work specifically with a rope attachment. Becket - The 40mm range features a large central hole, which is designed to be used as a becket (tying off point). SINGLE A2040 Technical documents can be downloaded here