All Glass Aroma Tube for your Arizer Air Vaporizer.
Compatible with Arizer Air and Arizer Solo
70MM - standard length that comes with Air
90MM - new middle length
110MM - longer tube, normally used with the Solo
Glass manufacturers try to make glass pieces as consistent as possible.
There will be slight differences in size for the aroma tubes, some will be tighter, some looser.
Arizer prefers a bit looser for extra air flow, they do not have an issue with you needing to hold your tube.