Double 5 Series Cheek Block with Delrin(tm) Sheaves.  Delrin 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), C/C (wide end) 1-5/8", C/C (narrow end) 1-3/8", SWL 1750 lbs. (795 kg), Weight 6.5 oz. (184 g), Max Line 7/16" (11mm)** TOP Sheave Safe Working Load 350 lbs. (159kg)