2 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)