The Midland Haldex 102626RX is a relay valve for heavy-duty truck air brake systems. Relay valves control air delivery to brake chambers, translating treadle pressure into fast, accurate chamber actuation across the axle group. Part number 102626RX is sold as a single unit. Pro Gear and Transmission carries genuine Haldex brake system components for fleet and shop buyers. Call us to confirm proper fit for your application.A factory handling fee of $25.00 per unit is added at checkout.FeaturesGenuine Midland Haldex relay valve, part number 102626RXClassified as an air control valve relay for heavy-duty truck brake systemsSold individually as a single unitDirect replacement relay valve for air brake chamber actuationAvailable from Pro Gear and Transmission