Excellent product. I bought some new wheels and tires almost three years ago and the valve stems have held up really well with no leaks, fading or chipping. I recently bought a new set simply because the body shop failed to save the valve stem on one of my tires from the accident. If they were sold individually, it would probably be okay to buy a new one and then just swap out the internal valves on a recent tire change. Installation is easy, requiring only a 12mm wrench.