Fully adjustable air springs to level your vehicle when towing or hauling a heavy load for a safe comfortable ride Up to 5,000 pounds of load leveling capability Easy to install with included detailed instructions Fitment details listed in the product description. Fits many 3/4 ton and 1 ton pickups and vans Lifetime Warranty with 60 day Ride Satisfaction Guarantee This kit fits vehicles with Reese 5th wheel hitch, with the exception of Reese Signature series and Reese hitches with custom rail kit installations. Does not fit with other 5th wheel hitches.