Product: Aluminum stringing blocks/stringing pulley blocks; stringing blocks.Description:a. We manufacture a lot of models for different uses in the overhead transmission line construction.b. They have are used to support conductors, OPGW, ADSS, communication lines.c. The sheave of the pulley blocks are made from high strength MC nylon, or aluminum materials ,and the frame of blocks are made of galvanized steel. The lateral ones are mounted on ball bearings.Remarks: All kinds of pulley blocks can be manufactured according to the customers' requirements.If any interested, please feel free to contact with us for more information, and we will try our best to comply with your requirements.