Product Details: Outfit your semi to be Ready for the Road Ahead™ with a comfortable ride and suspension height, with the Hendrickson 1/4" NPT 5-Port Height Control Valve. Thanks to its sophisticated design, this replacement valve is able to regulate the compressed air levels of a vehicle's suspension, allowing operators to increase or decrease ride height as needed. Crafted with an innovative body to quickly replenish air levels after dumping cargo loads. FleetPride is your First Click in Heavy Duty®.