I didn't like that they were ripped off at the car wash which cost me a new tire and four air valve stems for over $500 plus towing. However, they looked good if you only had time to hand wash them.
Don't buy these - the interior is too long for the standard valve stem to reach the rubber seal at the end. Buy shorter versions and be sure to use purple threadlock to keep them from rusting on the valve stem.
These caps were corroded and stuck to the brass valve stem. It can be road salt or dissimilar metals. I had to cut 2 caps off with a dremel which damaged the valve stems. They looked cool but I will never use metal caps again.
UPDATE: I ordered the blue caps and after 6 months they became purple/discolored. More importantly they do have a rubber seal internally but only on the end which means the threads are aluminum meaning there is a risk they could melt/corrode the valve stems.