30mm Plain Bearing Triple Block With Becket.This plain bearing block is constructed from recycled plastics and features a durable acetal sheave, providing a long lifespan and low maintenance. For superior performance, we recommend using the Dynamic block range instead. Additionally, the Ultra-Strap, a sturdy stainless steel strap, securely holds the block together and serves as a rope-friendly attachment point. The inclusion of a becket also makes tying off easier and helps to keep the load centered.