Be very careful with this. After I fitted them to my car, three of the four fused to the valve stem. When I took the stem with pliers and used enough force with another pair of pliers to remove the cap, it actually ripped in half leaving the bottom portion fused to the stem. The rest were positioned so that the pressure gauge and inflators were no longer on top of the valve. Good that my tires were worn out. I suppose it would be fine if you lube the threads, but who wants that? I went back to black plastic.