Harken 2.50 Extra Wide Sheave Sheave dia. (in) 2-1/2 Width (in) 1-3/8 Center hole dia. (in) 5/16 Fasteners (in) 5/16 Weight (oz) 7 2% Friction loss load (lb) 3000 SWL (lb) 3000 Breaking strength (lb) 6000