Vapr4life coolcarts blank or prefilled doesnt matter are 3.6 ohms, and the prem or hotter ones wow ones I think their called are 2.6 ohms, these ones run great on a 3.7 device. Also these are vertical coil not horizontal, but like I said I have used the wow hot cartos form v4life and they vaped real nice. Also the ones from v2 cigs blank or prefilled are between 2.6 and 3.0 i was told by the company. The guy didnt know and I had to talk to someone higher up and it took him 5 mins to find the info but now you know before you order. It was funny the guy said man your asking really technical questions now lol. Im not sure if their vertical or horizontal coil, but will post after I open some up.
