The beam of the pulley block is made of high quality alloy steel, side plate are made of Q345B carbon steel, each sheave with a single sliding bearing, which is perfectly safety for lifting, 3-sheave 50T, 5-sheave 200 tons, all can be done.
If you have requests for this pulley blocks, please feel free to contact us. +86-130 1205 1391 Sype: jun.shi03