Beautiful Valve stem caps (air valve nuts) are designed and manufactured, using the highest quality chromed ABS plastic. Each valve stem (air valve) logo caps is hand assembled and fitted with a Buna-O-ring for a proper air tight seal. These highly colored logo valve caps are poly-carbonate protected. This special coating acts as a scratch and UV protector. Packaged in sets of four (4) . Will not interfere with TPS.