Fixed Fairlead/ Ball Bearing 300-313 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 7 16" (37 mm), Max Line 7 16" (11 mm), Length 7 16" (11 mm), Width 3 4" (19 mm), Height 1 31 32" (50 mm), Bearing Height 5 8" (16 mm), Fasteners (2), #10 RH (5 mm), C C 1 3 4" (44 mm), SWL 1000 lbs. (454 kg), Weight 2. 2 oz. (62 g)