Bendix K240780 is the MV-3 Dash Valve, an air brake park control valve that mounts at the dash. Valves of this type put two push-pull buttons in a single body, so the driver sets and releases the tractor and trailer parking brakes from the cab. One body takes the place of a group of separate push-pull valves, which cuts down on air plumbing behind the dash, and a double check valve keeps the two supply circuits isolated from each other. A genuine Bendix part from Pro Gear and Transmission. Call us to confirm proper fit for your truck.A factory handling fee of $20.00 per unit is added at checkout.FeaturesBendix part number K240780MV-3 dash valve, listed as an air brake park control valveTwo push-pull buttons in a single body for tractor and trailer parking brake controlOne valve body in place of several separate push-pull valves, with less plumbingA genuine Bendix part sold by Pro Gear and Transmission