Sounds silly, but I bought custom valve stem caps for my truck. I bought a new red truck in late May 2020 and one of the little things I bought to set it up and show my military pride were the valve stem caps. wait what I'm a US Air Force veteran, specifically a retiree. And as you know, the colors of the Air Force are royal blue and silver. How do you put some light blue and silver on a red truck with black trim without getting distracted by the red and black? You are purchasing US Air Force style valve caps. Slim? So much so that even Sherlock Holmes would miss her. A point of pride? ABSOLUTELY! Ok, for the rating. Those are valve caps. They are well made and fit the valve stems as expected. They're definitely better made than the valve stems themselves, as each cap fits a specific tire better than the other, but the valve stems are as cheap as can be and still perform the function required. They're anodized black to blend in nicely and the best of any I've bought has the (modern) USAF emblem on the top. You know full well that I would buy them again!