I asked for a refund on these as I ordered 45 degree valve stems and they sent 90 degrees. Well, they sent the 90s again. I finally got them to work, but #1: 45 degrees and 90 degrees are different. #2: They are terrible quality and when I put them on wheels they were 50 degrees. They ate really soft metal. I actually reordered them a year after installing the first set and they were rotting like crazy. but nobody else turns the curved valve stems I found. They work a few months and then come back to replace them.