7 Series Double Cheek Block with anodized Aluminum cheek. Delrin(tm) sheaves ensures smooth operation 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 1-29/32" (48 mm), Fasteners (4) 1/4" RH (6 mm), C/C 3-5/8" (92 mm), SWL 2250 lbs. (1020 kg), Top Sheave Safe Working Load = 500 lbs (227kg) Weight Alum. 13 oz. (368 g)