Don't know what Nitrogen regulator I need. Just wasted €300.

[Meditation guide]

One of the US suppliers you posted had those as standardized sizes. I have one from them.

I wish I could ask you what supplier. I seem to only have these huge companies near me that only work with big companies, or doctors or things like that. I see I can't message you.

 

[SpanishLullaby]

I wish I could ask you what supplier. I seem to only have these huge companies near me that only work with big companies, or doctors or things like that. I see I can't message you.

I followed you temporarily so that you can PM me. Happy to provide the info.