Triple block with swivel Carbo 75mm. Ball bearings, sheave and sideplates UV stabilized with black additive for a maximum protection. The high-load 75mm Carbo has a broad working range. For 9/16'' rope. Working load: 3639 lb. Sheave: Long-glass reinforced engineered nylon. Ball bearings: Engineered plastic in fitted ball races. Sheave size: 2 15/16'' (75mm). Line diameter: 9/16'' max. Cheek material finish: Long-glass reinforced engineered nylon. Shackle/strap: Stainless swivel shackle.