Hi a friend gave me a penstyle e cig and i dunno what thread it is so i can buy a refil. I currenlt have a carto but it doesnt fit. Can any tell me what threading is it? It was from e-XXX.com and i dunno if its the e8 or the e9. the only think i can tell from the penstyle batt is that the charger model number which is EC-USB01.
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