Ranges from 2.0 to 2.7 ... I ordered 3 sets, or 30 heads and 100% of them work great and only 2 were 2.7 which is outside my acceptable to use range. The rest were awesome. I like the larger ones as they are easier to rebuild when it's time. However I need the 9mm for my Aro's and Evods ... so it can be dicey finding something that fit's all my tanks and my klutzy fingers at the same time. This ones is best so far of all the ones I've tried. Fits all my tanks KWX10 Authentic Protank MT3S X10 Protank-II Style RG500 S3000 Calabash Style K2 RG400 Vivi Tank BCC Aro Evod

I have written 2 tickets requesting that these be listed with the e-smart batteries. Regular charging cords do not work with the deeper well of the e-smart batteries. You must get these for a good, safe connection for charging.

These were so beautiful and I loved the clear one with the gem splatters ... but the bottoms cracked and broke some after only a single use and some after a week of use. I used the Dekang Melon diluted 400% and the Virginia Tobacco diluted 50%. Neither has ever cracked any tanks or any of my other plastic mouth tips. I have requested an RMA to return these before the rest of them break as well. 3 are now broken - 4 to go.

This is a great tank. Good quality and sleek look. It is heavy and really should be used with a 19ml beauty ring. I would suggest the higher quality more expensive one, as the cheaper one really looks tacky and cheap with this quality tank. I use the T3S E-Cigarette Clearomizer Replaceable Coil Head SKU: 1418300 and once I have turned the platic cup thingy around, there are no leaks, no gurgles and I can vape the entire tank down to dry with no problems.

The Dekang Amaretto is, uh, very, very, very strong cinnamon with a hint of almond behind it...Think cinnamon the spice, not cinnamon candy, since it is not all sweet. A tiny drop mixed with Liqua Apple creates Apple Pie, but alone it's way too overpowering. I think a bit of steeping may help.