VapeShell / DotShell – MTL Air Flow Pins Kit includes:

-One Air Flow Pin with Inner D=1.0mm
-One Air Flow Pin with Inner D=1.2mm
-One Air Flow Pin with Inner D=1.5mm

They reduce Positive Tube’s initial D=4mm down to D=1mm, D=1.2mm and D=1.5mm respectively, offering the ideal air flow for a substantial range of MTL (insert random use, not related to actual intent) profiles.