2 Series Fixed Fairlead/ Ball Bearing 200-312 Series fixed fairlead block. Low profile keeps control lines and halyards close to the deck. Delrin(tm) ball bearing sheave ensures low friction and high strength. Sheave Dia. 1 1 16 (27 mm), Max Line 5 16" (8 mm), Length 1 5 8" (41 mm), Width 19 32" (15 mm), Height 1 17 32" (39 mm), Bearing Height 9 16" (14 mm), Fasteners (2), #10 RH (5 mm), C C 1 1 4" (32 mm), SWL 500 lbs. (225 kg), Weight 1. 0 oz. (28 g)