Spring Loaded/Lined Slide/Aluminum for 1-1/4" T-TrackDelrin™ sheave ensures smooth operation and high safe working load. Anodized aluminum cheeks and stainless steel slider ensure reliability. Polyethylene liner and pin stop allow for easy adjustment.Specifications:Track Size 1-1/4" x 3/16" (32 mm x 5 mm)Max. Boat Length 33' (10 m)Max. Boat Weight 12000 lbs. (5455 kg)Max. Sail Area 520 sq. ft. (48 m2)Sheave Diameter 2-3/8" (60 mm)Max Line 1/2" (12 mm)Length 4" (102 mm)Width 1-9/16" (39 mm)Height 4-15/16" (126 mm)Bearing Height 2-3/8" (67 mm)SWL 2250 lbs. (1020 kg)Weight 12 oz. (340 g)