Product Details: The Haldex 7" Adjustable Precision Response Plus Height Control Valve is the perfect choice for any truck, tractor, trailer, industrial or recreational vehicle air suspension system. This valve features an adjustable control arm and a normally open dump valve for efficient plumbing and installation. It is fitted with the industry's tightest dead band to eliminate ride height variation and comes with mounting nuts and washers for easy installation. The valve also makes use of ceramic seal technology for remarkable durability and reliability. FleetPride is your First Click in Heavy Duty®.