04375 Sheave, Designed For Wire Rope, Attachment Type Center Bore, Max. Cable Size 5/16 in, Rope Diameter 5/16 in, Working Load Limit 1,700 lb, Sheave Outside Dia. 4 in, Sheave Inside Dia. 7/8 in, Eye Hook Inside Dia. None, Sheave Width 21/32 in, Bearing Type Bearingless, Block Material 316 Stainless Steel, Sheave Material Steel, Length 4 in, Width 4 in, Finish Zinc Plated, Standards ASME B30.26