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I bet you I could go down to my welding supply shop and get a big bottle of that stuff. Pay about 95% less than if I bought one that's certified and has a, yeah. You know this stuff, the oxygen is oxygen. I mean of course they have to make sure it's pure and really pure, pure and up to grade because it's for medical use. But, and it's the same stuff. Oh dude, 100% is the same stuff. When I used to fill my truck instead of getting the big TGS tanks delivered to me, I filled on one side to my medical. The only difference from the other side where they filled the commercial gas was I tested mine. They didn't test theirs. But they were using the same 99.99% pure tank I was to fill from. So yeah, it's exactly the same. It's just like you say, it's not controlled and it's not registered.