Twin Sheet Block for 1-1/4" T-Track - BlackHardcoat anodized aluminum body and slider provide a high strength block. Aluminum sheave runs on nomex/Teflon bearing for a low-friction, high strength sheave. Articulating sheave allows for a proper lead. Pin stop makes adjustment simple. Specifications: Track Size 1-1/4" x 3/16" (32 mm x 5 mm); Max. Boat Length- 38' (11.5m); Max. Boat Weight- 18000 lbs. (8182kg); Max. Sail Area- 715 sq. ft. (66 m2); Sheave Diameter- 2" (51 mm); Max Line- (2) 5/8" (16 mm); Length- 4-1/2" (114 mm); Width- 1-3/4" (44 mm); Height- 4-1/2" (114 mm); Bearing Height 2-3/4" (70 mm); SWL 3500 lbs. (1590 kg); Weight 1 lb. 7 oz. (652 g) ; - cis2:mm5mnJlm -