3 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)