i looked on that list but kind of thrown myself a little i think with trying to measure my misshaped o-ring myself
(admittedly with a tape measure too

)
i was thinking the 18mm that's on the list has got to be too big,
going on the rest of the sizes the 18mm must be the one for the top of the glass and not 15mm or 16mm that i was getting.....
but i'm still not 100% certain a 18mm I.D. would be the right size.
edit; are the measurements taken at the time for O.D.?? but the links given on the list are I.D.
i think thats what's must have happened actually looking again....
so yes
@1ynne after rereading your initial post lol you were already on it.....my apologies,
i thought i read that but it still did`nt fully register what you were actually saying.....
i think i took it as you`d made the mistake but got away with it with one o-ring,
and/or i generally overlooked it,
either way i need sleep and my two brain cells are hurting
