1-1/4 T-Track Stainless Steel slider.   Includes Polyethylene liners to allow for easy adjustment.   Track Size 1-1/4" x 3/16" (32 mm x 5 mm), Boat Size Up To LOA, Displ., Sail Area 38', 12000 lbs., 520 sq. ft. (10 m, 5455 kg, 48 m2), L 4" (102 mm), W 1-11/16" (43 mm), H 1-3/4" (45 mm), Eye 1" (25 mm), Eye29/32" (23 mm), SWL 2500 lbs. (1134 kg), Weight 7.5 oz (213 g)