The Bendix 1/8"-27 NPT Control Port Air Brake Pressure Proportioning Valve is designed to help drivers adjust the pressure being applied to brakes, preventing wheels from locking up and providing better control over the vehicle. This valve is easy to install and helps to enhance the safety of the vehicle by improving braking performance. This valve is a great choice for those looking to improve the safety and performance of their vehicle. FleetPride is your First Click in Heavy Duty®.