The top cover of the SMOK TFV16 Tank can be rotated to reveal a locking button that allows you to fill it with 2ml of e-juice. With the help of an expanded double intake and the AFC airflow control ring at the bottom, the TFV16 sub-ohm tank's flavour and vapour production are increased for the user. The nickel chrome used to make the TFV16 mesh coils.