Update your vehicle to be Ready for the Road Ahead , with the Sealco 1/4" NPT Trailer Brake Hand Control Valve that pairs with a wide number of pneumatic operations. Thanks to this replacement product's easy-to-use handle, operators can effortlessly relieve built-up air pressure inside of hydraulic system increase brake performance. Designed for extended use with tractors, heavy duty vehicles, and other active/idle applications. FleetPride is your First Click in Heavy Duty .