Milaana. Lana. LANA. LANAAAA! (TM2/TP80/BAK/FW9)
No, it's a very early Mi and a follow up. I don't think either are deep. Unfortunately the spec's have been inconsistent, maybe not the full depth, but not fully deep either.
Exactly, there is variance, throughout the product life span, and all the different builds. But the glass used in all of them is technically 22mm. Anyway we've ventured decently off topic now...
I am looking forward to trying the nub cooler with my other 18.8mm glass vapes, we'll see which ones it fits well, but I know it will at least fit my current Tubo and future Dual pretty perfect!