Product Details: Made with Expertise Built In™, the OTR 4-Way Push Pull Valve is designed to enhance vehicle performance, consisting of a valve body, plungers, and spools. These brake valves are engineered for easy installation due to it being housed in a single body containing dual circuit supply through a double valve check. Receiving air supply protection from whichever service reservoir is at higher pressure, you will have the same form, fit and function as OEMs and major brands for your truck. <br/><br/>FleetPride is your First Click in Heavy Duty®.