Product Details: Outfit your truck to be ready for the journey ahead with a comfortable ride and suspension height, with the OTR 3/8" PTC Height Control Valve with Expertise Built In™. 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®.