The T3S is a bottom coil Clearomizer tank system by Kanger. It features replaceable atomizer heads and an e-liquid capacity of about 3mL. The T3 is eGo Cone threaded fastens onto the outer cone threads of an eGo battery. 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 two piece design is a major advantage over other tanks with replaceable atomizer heads.