Labelled as "510 XL CE2 Clearomizers Ultimate Edition", and it's been in use since approximately March 10. It has been used only for BWB Applewood and just under 40 mL of it. I haven't taken it apart yet but it is definitely NF. Typical use at 3.7 V although occasionally I did bump it up to 4 for curiosity's sake. The package said 2.4-2.6 Ohm but over the last few weeks its been testing at about 3 ohm. How does this compare to everyone elses luck? Cheers, VC