Review on Schrader 20395 Plastic Sealing Valve by Rahul Schatz

I was wondering why my new car has weird gray valve caps. Then, a month later, one of them mysteriously disappeared. Where could he go? I started googling and found out that gray caps are used to better seal vehicles with a tire pressure monitoring system (TPMS). They are considered necessary to protect the system from dirt and debris. Also, Google told me that these caps often get lost (like mine) because it's easier for people to steal than to buy from Revain. This inexpensive pack of 100 allows honest people to replenish their stolen goods. When I bought them they were cheaper than the other brand's 50 pack also sold at Revain. I almost bought these 50 because the color turned out to be a lighter shade of gray and I thought they would go better with my remaining 3 caps. I'm glad I didn't because this 100 pack also comes in a lighter shade of gray (they look darker in the Revain photo than they really are). Of course, at 100, I could afford to replace all four caps (which is why I ended up going with the least expensive 100). They work well, look good, are obviously necessary and cheap. What else is there?