So I just ordered a provari and was looking for a tank to go along with it and I saw that a large amount of people use these IBTanks. I went on their website to kind of build my tank. How should I know what size to get, and what o rings to buy. But what is most confusing was there was not an atty anywhere I could see so I dont know what I would do with one of these tanks. So maybe if one of my fellow e cig members could help me out I can make sense of it and place an order with them tonight. Thanks everyone...... By the way, I would be lost in my vaping world if it wasnt for this forum. The help that the veterans give me and the time they take to do it is really nice. You only hear about bad news when you read the paper or watch the news, I know it isnt easy giving up your free time just to help a stranger you dont even know and if I could give out tips I would. Money tips not knowledge tips, it just goes to show that there really are still good people in the world. I am from New Jersey by the way. People are real a holes here, so its nice to see some kindness for a change.