508 Mm Transmission Line Stringing Pulley Block Our grounding roller stringing block, nylon sheave pulley block serves to release the induced current of the conducting wire into earth when applied to conductor stringing construction. Our users can see Large Diameter Stringing Block for other parameters about the block. Also, customers can order other large diameter stringing blocks with grounding roller. Just adding the postfix 'D' to the model of block is enough. Technical Parameters Item number Model Outside diameter of sheave (mm) Sheave number 10301 SHD508D Φ508×75 1 10302 SHS508D 3 10303…