Review on Corrosion-Preventing Valve Caps: Official Chrome Copper Tire Stem, Car Dust Cover, Wheel Tire Air Caps Valve Stem Cover (Set of 4) for Volvo – Ideal for Cars and Motorcycles by Michael Jennings

The quality of these stem caps is excellent. The logo on the top looks like they are OEM due to the quality, but obviously they are not. For the money they look very good. They are all metal, including threads, and have small gaskets inside to prevent leakage. I think they will last for many years before going bad.