Selden ROLLER BEARING BLOCKS
Low resistance at high, dynamic loads are the main characteristics of roller bearing blocks (RBB). The ability to easily release a highly loaded back stay tackle, german sheeting boom, a spinnaker halyard or a kicker tackle makes for fast, safe, and cuncomplicated maneuvers. You will find yourself focusing on what really matter; Boat Speed.
designed for high load dynamic applications
machined black anodized aluminum cheeks and torlon roller bearings
PA washer insulates stainless from alluminum to prevent corrosion
The shackle features a 6/8mm boddy and 8/10mm pin, a strong and lightweight combination
the swivel pin is hollow and chamfered to reduce weight
acetal ball bearings stabalize the sheave shen subjected to side loads