They can also be seated around the bottom air flow (BAF) Sai coils when using them in the New Sequoia to form a better seal if desired, as shown in the photo.
1 x Viton o-ring - 13x3mm
I had to use this in anger the other day: sudden sore throat after one harsh rip and no time to change mouthpieces.
Imagine my surprise and delight to see i) hydrotube with fresh water in reach, and ii) this o-ring sitting on my AVS mouthpiece. I like that the o-ring doesn't get in the way, it just sits there quietly until needed. At this price I would be happy to have it, and never use it. Thanks for sourcing these for us RecVapes.
You're welcome! I did the same thing last night, this morning I just put one on each atty! Good old o-rings, so useful.