These wires and coils are designed for rebuilable atomisers. Coils are premanufactured for the ease of installing and vaping. Wire is manufactured for the more customised vapers who like to change up those style or only like to vape their ownmade coils. There are many different types of vapeable wires; kanthal, nichrome, stainless steel, titanium, etc. If you have any questions regarding building, wires, and coils, feel free to message us on Facebook or shoot us an email at email@example.com.