Replacements are very necessary and that's why Aspire thought ahead. The replacement coils for the Aspire Nautilus AIO Kit come in a 5 pack, ready to fire up immediately. These replacements coils are made to be used with the Nautilus AIO kit by Aspire. The coil featues a 1.8ohm resistance. Inside the AIO kit, there are two coils. One is optimized for nicotine salts while the other is for regular e-liquid. Take your pick when you're purchasing! WARNING: This product contains nicotine. Nicotine is an addictive chemical.