Generous, aluminum side plates protect the rope and keep it in place ; 12? (12.7 mm) rope capacity ; Strength rated to 6,000 lbs. (2722 kg) ; 10-0695 red celcon sheave weight: 6 oz. (168 g) ; 10-0696 black aluminum sheave weight: 7 oz. (198 g) ; 10-0697 blue aluminum sheave/sealed bearing weight: 7 oz. (198 g).