These valve covers are as described and shown. So far they are all doing their duty, but I am worried about their future. Decorative caps can be their own worst enemy when it comes to oversized, protruding and uneven surfaces. As small as they look in the picture, they appear huge when placed on the valve stem. Since they spin at high RPMs when walking down the street, I can't help but wonder if that extra wind resistance will cause them to loosen (unscrew) and then become lost and/or worseβ¦