Allen Brothers 40mm Dynamic Block with Swivel Head High Load Swageless Connectors & Splice Links Additionally the ball bearings are

Additionally the ball bearings are configured to act as a thrust bearing between the sheave and cheeks

Stainless steel elements are put through a special high energy finish process to achieve a uniquely smooth edge and surface finish

TABS -->Manufacturer part #: 308-074R

Acetal slide rods

Manufacturer part #: 70-27

Allen Brothers 40mm Dynamic Block with Swivel Head High Load Swageless Connectors & Splice Links Additionally the ball bearings areAllen Brothers 40mm Dynamic Block with Swivel Head High Load 40mm Dynamic Single Swivel Block with High Load Sheave. New for 2023. Made from high strength, lightweight glass loaded nylon and featuring Allens dynamic bearing technology for a high performance block suitable for keelboats and dinghies. 40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines. High Load Sheave High load blocks