I bought this from a guy here locally and thought it was just some type of souped up carto but now that i have busted it out to fill and use it i have become a little confused. the only labeling on it is on the endcap/plug/ whatever it is called and it says microcig. I checked out the site and cannot seem to find it. As you can see it is quite a bit larger than a reg carto. Also, after having taken out the two little plastic plugs in it i have found another one that i havnt been able to get out. It looks like it may be glued. The guy I bought it from couldnt really tell me anything about it.