I am sure the tube is 1.75” - but as I said, it tapers towards the end to less than that.
Well, I think I’ve actually made it (or almost made it) to 7” x 5” erect, so I’m not packing the entire length but I am at the base and my glans is getting squashed, so I’m not even sure the pressure is even (don’t know if the remaining air around the shaft is getting past the glans and creating even pressure).
Anyway, I thought maybe I better not use it anymore (I have actually ordered a 2” tube with straight sides at a local adult store week before last, but haven’t heard back yet) so I tried my 2.25” tube again last night. It’s still too big, but at least I know the pressure is even.
In the 2.25” tube I can’t comfortably pump past 6”Hg anyway, so I guess I won’t be - too much pelvic flesh gets sucked in and it’s just very uncomfortable.
Thanks for the concern - truth be told the only discomfort at higher presure in a larger tube is around the base of the tube. My shaft and glans actually really feel good even at 8”Hg. So now I’m absolutely fanging for that 2” tube to come in!