The original (German) PC tanks are excelent but not these ones!
I suggest you to buy these spare elements:
PEI tankSS tankO ringsThis RTA is really great flavour vape chaser.
Ps.: There is no stress relieved after manufacture and is therefore cracking by the PC tank. (after-care, stress relief)
Edited on 2/16/2019 at 12:07 PM. Reason: