Arizer Solo Glass Stem
The Arizer Solo comes standard with two all glass stems, one straight 110 mm and one bent 110 mm. As will all glass products these may eventually need replacement. From a usability point of view the bent stem may be a bit harder to clean but for flavor and vapor quality either the straight or bent are identical.
At the end of the day it comes down to which tube feels better for you and makes your vaping session seamless and ejoyable.
You can also use these for your Arizer Air as these tubes are interchangable between both units.