Back when Tarsius released the quartz kits, they had some issues with the glass, and lots of folks ended up with broken kits. (more info here: http://www.e-cigarette-forum.com/fo...sed-pyrex-tank-kayfun-yet-2.html#post12175461)
Not sure if newer batches have solved the issue, but the edges from the Tarsius kit and the edges from the IBTanked glass are quite different. Jvapes sent me a replacement when I contacted them about it, but I haven't tried to use it. Both arrived together and I switched to the IBTanked once I saw them side by side.
I paid U$33 for 3 pieces from IBT, they come in cool plastic cases that I find great to keep the glass safe while cleaning/refills. Here are some pics:
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edit: I can't confirm if the measurements above are also compatible with the other versions (rainbow and SoV) but they work great with the Tarsius version.
is that the halfling tube or the full size tube?