Features Specs Photos Downloads • Aluminum sheave with ball bearings. • Compact steel frame. • Crosshead and type ‘B’ socket for suspension. • Lightweight construction. • Working Load 8,000 lbs. • Manufactured in the USA with North American made components. 4700 Series Stringing Blocks PDF 1 file(s) 338.86 KB Download 4728-1RB OPGW Running Board PDF 1 file(s) 589.68 KB Download 4730-1NyS OPGW Stringing Block PDF 1 file(s) 344.19 KB Download Transmission Distribution Underground Trenchless OK Champion Systems GREENMACHINE®