The Smoktech Magneto has a 7/8 inch diameter (1 inch = 25mm). I suggest a 25mm
IBTanked pyrex cartotank. You'll have the option of three tank lengths: halfling (shorty cartos), standard (35mm cartos), and XL (45mm cartos). Low profile stainless steel endcaps ($17.50). Glass tube is $ 7.00. Large selection of drip tips on the website, as well as the appropriate cartomizer to use (Boge vs Smoktech). I prefer Ikenvape cartos from the
Ikenvape website.
25mm tank juice capacities:
25mm HalfLing = 2ml
25mm Standard = 5ml
25mm XL = 8ml
Many people using a mechanical mod prefer using low resistance cartomizers. Others find that too warm or harsh and will use standard resistance. Single or dual cartos is also a personal preference; I prefer single coils after trying both.
25mm IBTanked on Silver Bullet
halfling tank
XL and standard tanks
IBTanked pyrex tank review
Baditude's Cartotank Setup Guide