Looks great and each has a plastic insert that attaches to the valve stem. This prevents the aluminum alloy barrel and cap from "welding" together. This has happened to many other brands, but not this one. Update: They look great but after such a short time and only removing them a few times the internal plastic threads are starting to wear out. Now none of them will fully tighten the valve stems. Too bad because otherwise they are good. They soon end up in the trash.