15LPM Oxygen Regulator CGA-540, Adjustable Flow 0-15 LPM - ASTM G175-03 - Aluminum/Brass, Max Inlet: 3000 PSI, Outlet: 50 PSI - Compact 1.38 inches X 6.29 inches

Works like a charm on my O2 tank for bait tank

Needed a second O2 regulator to leave at the cabin. Mountain air is thin so this was perfect!

I thought I'd at last found a regulator that would do 25 lpm for a price I could afford ... and it did work for awhile ... but it only lasted 6 weeks. Two weeks after the return date some inner seal failed completely, allowing a strong flow of oxygen to flow out at all settings, even 0. So ... cheap junk, imo, save your time and money and look elsewhere. Also the meter showing the level of oxygen was a couple of ticks off, I ran out of O2 when the gauge still showed half way up in the red zone. Cluster heads can avoid this one!

These are cheap, low quality regulators. Don't set your expectations high. I have a few of these and one day I look at one at the gauge broke off. Not sure how, but I'm not too mad because I only spent $30 and it lasted a while. Just be gentle with it, and it will be fine.

I am not using this for medical purposes. I just wanted a cheap option for controlling air flow when I put oxygen into aquarium fish bags. For that purpose it works fine. I like that it is affordable.

Cheap China garbage!! Gauge shows 1400 PSI when I received it. (not hooked to tank). This is scary if you were think you had 1400 PSI and the tank was empty. Sent back. Very dissappointed

Works fine, does what it's supposed to. It's sized correctly and decently well machined. It's a good price and is as nicely made as it needs to be. Simple part so there's not too much else to say about it.