Stainless Steel reefing slide for most boats to 30' (9.1m). Polyethelene liner allows easy adjustment. Track Size 1" x 1/8" (25 mm x 3 mm), Boat Size Up to 30' (9.1 m), Bail Width 5/8" (16 mm), Bail Height 7/16" (11 mm), L 3" (76 mm), W 1-27/32" (47 mm), H 15/16" (24 mm), Weight 4 oz. (113 g)