The Nautilus 2S is now equipped with a sliding top-fill system coupled with child safety and precise airflow control. The tank has a capacity of 2 mL as required by the TPD laws. It is compatible with 3 different coils. The 0.4 ohm coil which is ideal for Direct to lung (DTL) vaping. 1.8 ohm coil which is ideal for Mouth to Lung (MTL) vaping. One can also purchase seperatley, a 0.7 ohm coil which is meshed. This 0.7 ohm coil gives the best flavours and the biggest coulds.