17-60 system works on 1-1/4" T-Track. Includes everything needed for a 4:1 adjustable lead system. Enables use of existing T-Track for a quick and easy installation. Includes: 17-28 Lead Cars (2), 200-13 Fiddle Blocks(2), 74-41 Fiddle (2), 70-17 Cam Cleat (2), 78-93 Dead end bail (2), 40' 1/4" Line, 10' 1/4" Shock Cord, 78-51 Bullseye (2) Fits T-Track Size 1" x 1-1/8" (25 mm x 3.2 mm), Boat Size Up To LOA, Displ., Sail Area: 33', 12000 lbs., 520 sq. ft. (10 m, 5455 kg, 48 m2), SWL 2500 lbs. (1135 kg), Weight 5 lbs. 8 oz. (2.46 kg)