It's a Wismec Venti.
30mm diameter, 5,8 ml inside.
and....it works with Cl/CLR
coils !
And it works perfectly.
I just changed the huge drip tip for an Ego One.
Currently I have a 0,5 ohm inside, the one with the white orings : it appears that the white orings
coils are from Wismec.
Quality seems the same as JT coils.
I bought the presa100 used on a board here in France (it's one of the rare single battery box that accepts 30mm
tanks without overhang)
And the Venti in a German shop.
I had two Venti's for 24€ postage included.
It's huge and heavy, but it's for the home and I like having 5,8ml !!
So...one of the Tron we traded (the gold one) was given to a friend of mine . He broke (again) a Mega V2 and was almost tankless
Keep me posted when Trump had the cure for Covid19, here it's starting being frightening, one child has it in my daughter's collège...
Kind regards to you D&K