Allen 40mm Single Block with Swivel Head grip Height of each shaker is

Height of each shaker is 4"

environmentally friendly

allowing you to maintain your focus and determination without missing a beat

providing safety to performance athletes moving at ever increasing speed

Adjustable suspension back closure to ensure a close fit

Allen 40mm Single Block with Swivel Head grip Height of each shaker is40mm Single Block with Swivel Head 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. Bearings Dynamic blocks feature Allen patented bearing system which uses twin rows of stainless steel ball bearings running on a