Really like these overall. I'm using them for extending latex tube valves for my deep carbon rims, and I like that they're threaded so I can use a valve nut to prevent them rattling around. I do have an issue with one of them, where air flow is heavily restricted for some reason. Tried it with a few different tubes and valve cores, so I know the extender is the problem. When it's not installed air moves through fine, so it must be something with how it engages the valve or core, like a thread or o-ring messed up. Only knocking one star off for that, figure it's probably a fluke, and even though it makes inflating that tire a bit of a hassle it doesn't prevent me from doing it.