17-68 Adjustable lead car for 1-1/4" T-Track. Features Stainless steel slider with polyethylene liners for easy adjustment. Aluminum cage is hardcoat anodized for durability. Aluminum sheave runs on our Nomex(tm) bearing for low friction yet high safe working load. Includes attachment point for a 5 series block on the front and a bail on the back side for adjustability options. Track Size 1-1/4" x 3/16" (31 mm x 4.6 mm), Boat Size 40' 23,000 lbs. 800 sq. ft., Sheave Dia. 2" (51mm), Max Line 5/8" (16 mm), L 5-1/32" (128 mm), W 1-9/16" (40 mm), H 4-3/8" (111 mm), Bearing Height 2-9/16" (65 mm), SWL 3500 lbs. (1590 kg), Weight 1 lb. 10 oz. (0.72 kg)