Bendix K061831 Dash Valve, model PP-DC, is a dash-mounted air valve that lets the driver apply and release the tractor parking brakes from inside the cab. It is classed as a tractor parking valve and is pressure sensitive, working to a set trip pressure rather than acting as a plain on/off tap. The supply, delivery and exhaust ports each carry a different colored cap, which makes it easier to plumb the air lines to the right port. The control buttons come with the valve. A genuine Bendix part from Pro Gear and Transmission. Call us to confirm proper fit.A factory handling fee of $20.00 per unit is added at checkout.FeaturesBendix PP-DC dash valveTractor parking valveSupply, delivery and exhaust ports with color-coded capsControl buttons includedPressure-sensitive operation to a set trip pressure