Our 20mm Double Plain Bearing Allenite Through Deck is the ultimate solution for guiding your rope and wire control lines seamlessly through your deck. With its durable acetal body and specialized sheave design, this block ensures reliable performance for all your adjustable rigging and high-load needs. Choose from single or double sheave options, as well as plain or ball bearing systems, to suit any application. The acetal sheave spins around the central axle, providing a long lifespan and minimal maintenance.