TPMS Valve Stems 4Pcs TPMS Tire Pressure Monitor Sensor Valve Stem Repair-Tools For Tyre Pressure Sensor Stems 4pcs Aluminum TPMS Tire Valves for Hyundai Tubeles... - Grandado The Tire Pressure Monitoring Valve Stem is the valve stem in the wheels of your car, on which the tire pressure monitoring system (TPMS) is mounted. The valve stem acts as a check valve by opening to let pressurized air inside the tire, and the closing when the right pressure in the tire is reached About this item Material: The TPMS valve stem is made of rubber construction with stable characteristics and high reliability, which is durable in use and has a long service life. Size: Tyre pressure monitoring sensor valve stem length is 6cm with a 1.2cm thread, the diameter of the cap is 1cm, the accurate size makes it capable to fit well with your tires and won’t lose easily. Practical... Material The TPMS valve stem is made of rubber construction with stable properties and high reliability, which is durable in use and has a long service life.