RN10HT Midland Haldex Repair Kit is the repair kit listed for a Midland Haldex fast air (FAB) relay valve, a speed-up relay used on converter dollies and long wheel base towing trailers to speed the tractor control signal to the rear trailer service brakes. A relay valve that is wearing inside typically shows it as air leaking from the valve or escaping from its exhaust with the brakes released, and worn seals or debris on a seat are common reasons. Call us to confirm the kit matches your valve. A genuine Midland Haldex part from Pro Gear and Transmission.A factory handling fee of $25.00 per unit is added at checkout.FeaturesMidland Haldex repair kit for a fast air (FAB) relay valveRelay valve speeds the tractor control signal to the rear trailer service brakesUsed on converter dollies and long wheel base towing trailersAir leaking from the valve body or exhaust points to worn internalsPart number RN10HTTech SpecsSupply (2) 1/2″Delivery (2) 1/2″Control (1) 3/8″Crack Pressure 0 PSIOEM Part Number N30096PACore Group 225Two Mounting Holes .34″ diameter on 1.50″ centersApproximate Weight 2.5 lbs.Additional InformationTwo mounting holes: .34 diameter on 1.50″ centers.Repair Kit use part number RN10HT.