Air Lift adjustable air helper springs level your load and give your truck van or SUV a safer more comfortable ride. Air springs are easy to install between your existing springs and the vehicle frame. Just add air when towing or hauling a heavy load and reduce air pressure when unloaded they are fully adjustable for a great ride. Air Lift air springs eliminate sag sway and bottoming out. They are made with rugged durable components for long reliable service. They have up to 5 000 pounds of leveling capacity right up to the manufacturer's recommended Gross Vehicle Weight Rating and are air adjustable from 5 to 100 PSI. LoadLifter 5000 kits fit such popular vehicles as ton and one-ton pickup trucks many Class A B & C motor homes and commercial trucks and other severe uses. They also come standard with a limited lifetime warranty and an exclusive 60 day ride satisfaction guarantee.