These Rebuildables are NOT, and I repeat, are NOT for the beginner. If you're interested in building your own atomizers, the first thing you'll need is an OHM meter. I got mine at Madvapes, but COV and other places carry them too. These are handy for cartomiszers, atomizers, and RBA's alike. It will not be a waste of money if you later decide RBA's aren't for you at this time. Here is a direct link to the one I have. http://www.madvapes.com/cartomizer-and-atomizer-ohm-meter.html Th