I used this on a Milwaukee CO2 regulator. A model that has been around for many years. If you have ever owned this model then you know that the bubble counter was and is the most fragile counter I have ever seen. Assuming I break a thread on a supplied bubble counter like I've done for 20 years, I've spent the same amount of time trying to find a good counter. This fits the bill perfectly. It attaches perfectly to the regulator, it requires no additional caulking around the threads, you don't need surgical tools to hold the o-rings on it, and it attaches firmly to the screw pins. . I haven't had any leaks and the pressure has never been compromised. I think if you still appreciate needles and like the added security of bubble counting, then this is the way to go. Hope this helps, best Matt D.
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