The Demon Killer 7-in-1 Coil Prebuilt Set is a great collection of exotic coils for the budget vaper. This kit offers exotic configurations for less than $2 a coil! If you've ever wanted to try exotic coils, but either don't have the time or patience to build them, this kit is for you! Note: Resistance in ohms is approximate. Kanthal A1 is typically the core wire, and SS 316L is typically the wrap wire.