I received these tubeless valves in different types, i have seen but not used all types before so though i better try these,
I am really pleased with the Quality of the STD Brass ones which even come with a nice green dust cap to aid in finding your valve if you need to add air after a burp.
The American classic valve are a godsend on rims that just don’t want to seal. It can cause a problem seating the bead (not the valves fault) but creates such a full proof seal it is easily worth it.
The mavic ones perfectly match the existing ones and sealed first time on both wheels.
The removable valve cores were all tightened to the perfect tightness so easily removable but not loose that they might come out with the dust cap as some have in the past.
The black alloy ones get the same review as the Brass ones, but in a great stealth look for those who want lightweight dependable performance.