thnx my m8.I would just get the 9mm one. The bung just needs to be thin enough to get into the inside of the pipe. That's not the part that forms the seal so it doesn't need to be spot on. The part that will form the seal is the mushroom head of the bung, which is wider then the inlet pipe. The pressure will push the underside of the bung onto the pipe and form a tight seal.
But nothing wrong with getting the second just in case
chuffed.
i’ll get the 9 & 9.5 lol…online shopping i go! fingers crossed i don’t buy over the ammount (i’m a a knob!)
btw when you watch the vid coming up, for all tested the internal it’s too small!
remember the days we fermented in our bottling bucket with the tap?
all come clear on this one, as long mega clean n sanitised!
WAIT OUT!