9,000 Pound Rolling Jack With (2) Internal Air Bags, Adjustable outriggers that Roll on the inside of the rail. Will easily slide onto a rack with rails that measure from 38.685" to 52.1875" center to center . Includes Detachable Mounting Pads with 3" and 6" Extensions. Lifting stroke of 11 inches. Est. Shipping Weight 480 lbs. Please fill out our Jack Compatibility Form before ordering. Document link is above.