The Bendix R-12® Series Air Brake Relay Valve is designed to accelerate the application and release of the brakes. This valve is available in two body styles and can be mounted on either a reservoir or a frame. It includes a universal mounting bracket that makes it simple to switch it out. This valve is designed with cutting edge technology for guaranteed effectiveness even in harsh environments. It is created to increase and improve vehicle performance. FleetPride is your First Click in Heavy Duty®.