Product Details: The Haldex Single Control Line Air Brake Relay Valve with Bracket is the perfect solution for efficient and simple installation of service brakes on a tractor or trailer. This valve is designed to quickly and easily apply and disable the service brakes with a single control line. The cover rotation won't impact the performance of the valve, making it a reliable and durable solution. The compact size of the valve make it easy to install and maintain, while the bracket ensures secures the mounting. This valve is the perfect choice for any application requiring reliable and efficient service brakes. FleetPride is your First Click in Heavy Duty®.