Product Details: The HDValue Piggyback Kit is the perfect choice for heavy duty trucks and trailers. It uses superior power spring technology for unparalleled force output consistency and its powder coated housing effectively resists fatigue and corrosion. The kit also features a rugged powder coated service housing for corrosion protection, double O-ring centerseal, two O-rings for positive sealing and plastic bearings for long life. With this kit, you can enjoy increased performance and better control of air pressure.<br/><br/>FleetPride is your First Click in Heavy Duty®.