One of Aspire’s largest sub-ohm tank, as it holds 4ml of e-liquid. It is 27mm in width and 50mm in height.The tank comes with two coils: 0.5ohm coil and 0.5ohm Mesh Coil, fires at an optimized rate of 65-75W. The mesh coil since there is more surface area of the cotton being used means more of advanced flavor hit. The coils instead of threading it to the base, you simply pull out the old coil and install the new one. It uses the triple slot airflow, that caters to both novice users and advanced users.Pull the top cap, place your thumb on the top cap right above the triangle symbol and push the top cap away until the filling hole is revealed.