The Kanger T3s is a bottom coil Clearomizer tank system by Kanger. It features replaceable atomizer heads and has a eLiquid capacity of about 3ml. The new Kanger T3S offers an improved design. The new replaceable head assembly, makes this a much more cost effective system. Great looks, great performance, great value! Get them while they last! Bottom coil cartomizers provide a nice warm vapor, with a superb clean flavor, and reduced wicking issues. Unlike other Clearomizers, the mouthpiece of the T3S is permanently attached and it is filled from the bottom. This three-piece design is a major advantage over other tanks with replaceable atomizer heads. If the T3S atomizer head fails unexpectedly and the tank is filled with eLiquid, the atomizer head (base) can be easily replaced without the need to drain the eLiquid in the tank first. To fill the T3S unscrew the bottom atomizer head. Hold the tank upside down and fill with 2.4 ml- 3 ml of eLiquid. With the tank mouthpiece-end down, screw the atomizer head back on. This Clearomizer is compatible with Ego series batteries such as the Joye Ego-Tank, Joye Ego-C, Joye Ego-C Twist and Vision Spinner battery.