For use with the Aspire Nautilus X tank. 1.5 ohm resistance. Nautilus X coils are now rated at 1.5Ω (14-20 watts). The Nautilus X coils incorporate U-Tech, the latest coil technology. Vape flows through the U-shaped chamber and passes the Kanthal coils twice before being inhaled. This all-new airflow performance allows for unrivaled vape flavor and e-juice taste.