Aspire Nautilus and Nautilus Mini BVC Coil Heads – 5 Pack These are for ASPIRE NAUTILUS and ASPIRE NAUTILUS MINI You have a choice of 1.6 and Omega and amp 1.8 and Omega BVC Its recommended by Aspire to use the 1.6 and Omega coils if you are using a standard non-variable voltage battery or a mechanical mod. If you are using variable voltage battery then you can use the 1.6 and Omega if you prefer more of a throat hit or 1.8 and Omega if you prefer a smoother vape. To change coil you need to turn clearomiser upside down, unscrew the base, unscrew the coil head, then just screw in the new one and leave for 5 mins then continue vaping. The Aspire coils have been known to last around 2 weeks or sometimes more, just change when you start losing flavour. PLEASE NOTE These coils are only for the Aspire Nautilus Range. They will not fit other tanks from Aspire.