Check the listing for details. Relay Valve Trailer RG-2 Haldex Midland KN28510 Midland Grau. Condition: New other (see details), Made in United States. Listed at 35.00 USD. 1 valve. New old stock Shipping Policy: We may ship via USPS, UPS, or FedEx and reserve the right to select the most efficient carrier based on cost, location, and delivery time. Equivalent shipping services may be used. If you require a specific carrier or service, please contact us before purchasing to confirm availability. Requests made after purchase may not be possible.1 valve. New old stock Shipping Policy: We may ship via USPS, UPS, or FedEx and reserve the right to select the most efficient carrier based on cost, location, and delivery time. Equivalent shipping services may be used. If you require a specific carrier or service, please contact us before purchasing to confirm availability. Requests made after purchase may not be possible.