Pack of 5 replacement coils for your Aspire Nautilus 2 clearomizer tank, also compatible with Aspire Nautilus Mini, and Aspire Nautilus. However, use of these coils in the original Nautilus series tanks may cause overheating, so use with caution in these tanks. Available in 0.7 ohms (18-23 W) resistance to optimize vapor, performance, and flavor. This coil system is an upgrade on the standard Aspire BVC coils, but will not function in basic Aspire tank systems. These are designed specifically for the Nautilus series of clearomizers.