I've used either 26 or 28 for mine (Can't remember, lost the package for this spool. But I know that it is one of the two). Been doing twisted coils in it for a while. I enjoy it.
The only problem now is that I lost the barrel that goes around the deck, so my Kanger is now useless. Kind of a shame since I lost it while wrapping this coil, so I never got to try this one out. According to my Eleaf iStick, it's a .5 ohm coil.