Product Details: Update your semi with enhanced control of its braking system, with the Bendix MV-3 Series 1/4"-18 NPT Push to Connect Type Dash Control Valve that ensures you're Ready for the Road Ahead™. Due to its advanced design, this replacement valve is able to help regulate how much brake pressure is applied to the wheels by controlling the flow of compressed air to various parts of brake system. Constructed with a durable design to withstand extreme pressures and idle operations. FleetPride is your First Click in Heavy Duty®.