The Air Lift 1000 Rear Kit 60738 is designed to work with coil sprung vehicles such as SUVs, vans, cars, pickup trucks, and RVs. The Air Lift 1000 air bladders (air bags) are simply inserted inside of your existing rear coil springs and inflated to prevent sag from towing or hauling a heavy load. This Air Lift 1000 Rear Kit 60738 provides up to 1,000 lbs. of load leveling capacity and can be installed in 2 hours or less. The Air Lift 1000 air bladders are made from tough molded polyurethane and comes with a lifetime warranty.