The Bendix R-12 Relay Valve, part number 802820, is a genuine Bendix air brake relay valve designed for heavy-duty truck air brake systems. The R-12 designation identifies this as a specific Bendix relay valve series used in commercial vehicle air brake circuits to reduce brake application and release lag by allowing air supply closer to the brake chambers. Available from Pro Gear and Transmission. Call us to confirm this is the correct valve for your application.A factory handling fee of $20.00 per unit is added at checkout.FeaturesBendix R-12 series air brake relay valvePart number 802820, also cataloged as BW802820Sold individually (each)Genuine Bendix air brake component from Pro Gear and TransmissionTech SpecsSeries: R-12Part Number: 802820Sold as: Each