tire valve caps are really good. They are very well made and durable. One point to keep in mind: I found them heavy enough to throw my wheels off balance. It was minor but noticeable. They weigh 1/3 ounce each, which is the threshold of perception. If you're a picky eater when it comes to wheel balancing, it makes sense to balance wheels with hubcaps installed. Either that or you just use them for show situations.