One of the most common complaints about the original tank was that the position of the airflow made it hard to see its setting and it could easily spin closed if taken out of your pocket or bag. The Nautilus XS has a lower positioning for airflow whilst still being located at the top to maintain total leak-free control. In addition to that, the airflow is larger and more responsive when the user is controlling it and yet more robust in position when stored away. One of the most common negatives with the original was the drip tip being a bespoke size and way too thin. The new peek drip tip is 510 fitting, wider, more heat resistant and brings a much better vaping experience. Specifications: Size: 22mm x 48mm 2ml tank capacity Compatible with Nautilus X U-Tech coils Convenient top filling mechanism Package Contents: 1 x Nautilus XS Tank 1 x Nautilus XS 0.7ohm Mesh Coil 1 x Nautilus X 1.8ohm Coil 1 x User Manual 1 x Set of 0-rings Introducing the Nautilus XS Tank By Aspire. This tank is a refined version of the original Nautilus X. Suitable for those making the leap from basic tanks to a more performance based tank.