7 Series Cheek Block with anodized Aluminum cheek and 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. 2-3/8" (60 mm), Max Line 1/2" (13 mm), L 4-3/8" (111 mm), W 2-3/4" (70 mm), H 1" (25 mm), Fasteners (4) 1/4" RH (6 mm), C/C 3-5/8" (92 mm), C/C (wide end) 2" (51mm), C/C (narrow end) 1-9/16", SWL 2250 lbs. (1020 kg), Weight Alum. 9.6 oz. (272 g)