4 x Universal Grey TPMS Sensor Valve Dust Caps Tyre Pressure Monitor System
These are not to be mistaken for the cheaper caps that are available elsewhere. These are premium caps that won't split.
A dust cap is a small cover used on the TPMS valve stem of a vehicle to prevent dust or other small particles from entering the valve and damaging it. The dust cap also forms a pressure seal, helping to prevent deflation of the tyre due to slight air seepage past the tyre valve. The dust cap is internally threaded and is secured by screwing it onto the end of the stem.
It is important to use plastic dust caps on TPMS valves, metal caps cause binding / corrosion.
These caps have rubber seals inserted which stop air escaping from the valve, this ensures accurate tyre pressure reading.