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)