Hey dude, pretty sure the 1/8 is the right fit for the ZAP if you take out the insulator in the earlier version
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The 1/8 fit's the zen'z~............snuggly, the wicks "need" some wiggle room, i'd say to all the zen~ holder's, wait for the grooved 7/64 wicks, it makes a world of difference, IMO.

