Series 3 Flat Base/Alum Cheek/Delrin SheaveDelrin plain bearing sheave ensures smooth operation and high safe working load. Stainless Steel base distributes loads to a larger surface area.Specifications:Sheave Dia. 1-7/16″ (37 mm)Max Line 7/16″ (11 m)Length 2-7/8″ (73 mm)Width 1-3/4″ (44 mm)Height 3/4″ (19 mm)Fasteners (4) #10- RH (5 mm)C/C 2-3/8″ (60 mm)SWL 1000 lbs. (450 kg)Weight Alum. 2.5 oz. (71 g)