I actually meant to ask for the glass stems but that ought to be fine. Basically these are the stems that fit INSIDE the heater core, right? So the heater core for the alpha dog must be ginormous, which means the glass stems (that fit over the heater core) for the alpha dog must also be ginormous, perhaps nearly as ginormous as they loom in my imagination.
Do we know what size the heater cores are, to compare relative sizes?
Standard Core vapes (Classic thru SC3) have a 3/8" OD core tube, the Alpha has a 1/2" OD core tube so they're actually not too far apart in diameter. The glass stems are metric and just slightly larger than those ODs.
Slight changes in diameter relate to larger changes in volume though and this is how the Alpha stems have such a high capacity. In addition the Alpha has so much air flow that you can load some really large bowls with the screens pushed way down and still keep the draw resistance reasonable.
The pic @arb posted shows our smallest stem that fits inside a SC series vape core and our largest stem which fits over the Alpha so the difference is very extreme there.
Here is Alpha Glass Direct Draw, Thick Wall for SC series and a thinner wall SC series GonG.