- Made from strong ABS plastic and beautifully finished in chrome.
- Inner "O" ring seal insecure a clean valve orifice and consistent tire pressure.
- Fits all standard tire air stem valves.
- Knurled head for easy on and off installation.
- Sold as set of 4.

According to the other reviewer, these valve covers are made of plastic. That solves a problem for me and I'll buy them. Recent Porsches have TPMS, the Tire Pressure Monitoring System. Steel valve caps interfere with transmissions from the pressure sensor in the wheel, so the owner's manual warns explicitly against their use. Plastic caps will do just fine.
I may come back and change my review to a five or a three after I use them for a while, but being made of plastic is not a deficiency, it's the only kind we can use on our cars.

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