Product Details: Get your semi Ready for the Road Ahead™ with a comfortable suspension and ride height, with the Haldex 7" PR Plus Height Control Valve. To allow operators to increase or decrease ride height as needed, this replacement valve works to regulate the compressed air levels of a vehicle's suspension. Fashioned with an advanced body to quickly replenish air levels after dumping cargo loads. FleetPride is your First Click in Heavy Duty®.