I have one like that, and i just bought a new bottle. i was wondering what to do with the old one. let me know if you are interested. it's a fairly long bottle, so it has alot of capacity.

On Wednesday, April 13, 2016 at 3:44:50 PM UTC-4, wrote:
Does anyone have a spare steel (D) O2 bottle they would sell? It needs to be 108mm (4.25") or less in diameter. John Murray found us one but we need two more. They vary considerably in diameter and the Mfg. is not interested in sorting out a few smaller ones for our use.
Thanks.
Dale Bu