Uses: It is suitable to string many kinds of overhead conductors on tangent structures. Compression

sleeves, swivel connectors, and pulling rope connectors can pass through the groove.  The sheaves are made of aluminum alloy or high strength nylon.

Notes:1.508mm,660mm aluminum alloy sheave can be lined with rubber.

2.660mm,822mm.916mm,1040mm nylon sheave can be lined with rubber

3.Three sheaves and five sheaves helicopter stringing blocks are available for two bundle conductor and four bundle conductors stringing.