TireMinder Braided Steel Valve Extender Kit For 16-19.5 Inch Aluminum Dually Wheels, is a rim mounted valve extender for 16-19.5 inch size tires. Is TPMS compatible, mounts to the hub of the wheel, allowing for inflating and monitoring of your dually tires in second. This will improve tire life, handling, driving safety, and gas mileage.