The Kanger T3S combines all the features of a bottom coil tank, similar to the Protank. The tip is made with clear plastic and is not a removable tip. These tanks feature a large 2.6ml capacity. The coil is easily replaced by simply removing the bottom of the T3S and switching the coil by just unscrewing it. The T3S is EGO threaded, it requires ego threading and will not work on standard 510 threading. The atomizer head LOOKS similar to a kanger protank, however they two can not be interchanged. The flange on the atomizer head is different between the T3S head and Protank head.