O-ring size on Mr. Heater/Cooker

[Iceman12]

Does anyone know what size the o-rings are on the Mr. Heater/Cooker? Mine looks in pretty rough shape and just wondering if anyone knows the size on them so I can go buy a back-up. I am talking about the o-ring on the end that you plug into the propane tank to seal that. Thanks

[18 inch Crappie]

Been there done that, it is some weird size. I could not find it at Home Depot or a hardware store. Ended calling them and they sent me some replacements for free.

[efgh]

Mine were in rough shape too, went to a local implement dealer, they had a whole drawer full of any size o-rings you could possible want, the size I neede cost 18 cents