32-58 Twin Sheet lead block. Clear anodized aluminum body and slider provide a high strength block. Aluminum sheave runs on nomex(tm)/Teflon(tm) bearing for a low-friction, high strength sheave. Articulating sheave allows for a proper lead. Pin stop makes adjustment simple. Track Size 1-1/4" x 3/16" (31 mm x 4.6 mm), Boat Size Up To LOA, 44', Disp. 28000 lbs., Sail Area 875 sq. ft. (13.4 m, 12701 kg, 81.3 m2), Sheave Dia. 2-11/16" (68 mm), Max Line 3/4" (19 mm), L 5-7/8" (149 mm), W 1-3/4" (44 mm), H 5-1/8" (130 mm), Bearing Height 3" (76 mm), SWL 4400 lbs. (2000 kg), Weight 2 lbs. 2 oz. (1.0 kg)