Sean Zimmerman-Wallwrote a review of Stan's NoTubes Tubeless Valve Stem - Pair on November 3, 2016
These are the tried and true design that mount up to virtually any tubeless rim. They are a bit long for most alloy mountain wheels, but it you have a set of Enve's or Reynolds, the length is appreciated. Removable valve core is key for quick inflation with an air compressor. Brass seems to hold up well to multiple tire tire changes. Lock ring is adequate, but an extra o-ring would be nice to ensure a tight seal. That being said, I have never had problems if the wheel is taped properly.