The valve caps on my tires always seem to get lost after a while. After learning that three tires on a car were missing valve caps, I ordered them. Given the amount in the box, they won't run out anytime soon (probably not in my lifetime!). These valve caps fit well but do not cover all of the valve threads on any of the tires on the three cars I have used them on. I'm not sure if this will cause problems in the long run, but that's why I gave them four stars instead of five.