Prepare your truck to be Ready for the Road Ahead , with the Haldex Push/Pull Dash Holster Valve that offers seamless control of your air brakes. Through its hand-operated control, this replacement valve adjusts the air supply in your brakes, making it a suitable option for daily braking and emergency situations. Engineered with a single push/pull valve that resists heat buildup and corrosion. FleetPride is your First Click in Heavy Duty .