Nautilus 3 tank uses Nautilus series coils emulates closely to Nautilus GT taste, will provide you premium MTL experience and extreme flavor enjoyment. The Nautilus 3 Tank offers several airflow options, which can be adjusted through 7 different configurations. The diameter of the airflow holes are: 3.0mm, 2.5mm, 1.8mm, 1.5mm, 1.2mm, 1.0mm and 0.8mm, which ensures richer and thicker flavor. The Nautilus 3 Tank boasts an innovative press-fit coil change system that makes coil replacement super simple, alongside an e-liquid shutoff valve to prevent e-liquid getting into the coil chamber whilst you change coils. No mess, much more satisfaction.