5 Series Cheek Block with Anodized Aluminum cheek and Delrin(tm) ball bearing sheave. Delrin(tm) ball bearing sheave provides low-friction and high safe working load. Stainless steel base distributes loads to a large surface area. Sheave Dia. 2" (51 mm), Max Line 7/16" (11 mm), L 3-5/8" (92 mm), W 2-7/32" (57 mm), H 7/8" (22 mm), Fasteners (4) #10 RH (5 mm), C/C 3" (76 mm), SWL 1500 lbs. (680 kg), Weight Alum. 5.9 oz. (167g), Max Line 7/16" (11mm)