The authentic Augvape Merlin MTL RTA is a 22mm tank that designed for flavor chasers. The tank is capable of holding about 3ml e-juice. The deck features dual post design for single coil building. The airflow system consists of 4 kinds of air plugs, side screws and AFC ring, which means you can control airflow in multiple ways. Standard 510 drip tip and SS MTL drip tip is included.