Sorry I didnt get back to this question sooner. Been making glass all day and just now finished. I would have been done about 4 hours ago but the Offspring handed me a list she wanted filled and sent me back out when I thought I was done :/
As noted the 19mm is about the diameter of the top of the Provari cone, the provari es is 22mm at its widest so this size does look very nice on it. Been working on the 22mm tube and have a bunch of glass made up for it but no caps yet. That was supposed to be my evening

Will try again tomorrow on that. Also working on a 30mm tank for 26650 mods. Been using an 8ml standard sized tank on my Bombshell Stinger and have also had it on a BAM, looks great on both. The XL version should be about 12mls.
Time for a cocktail for me and wind this day down, cheers everyone and thanks for all the support in making IBTanked such a success.