These GT series replacement coils can be used with the GTiO tank included in the Eleaf Amnis 2 kit. They come in choice of 0.6 or 1.2 ohms. There are no threads which allow for quicker and easier changing. This is for a pack of 5 coils. GT coils can also be used with the Eleaf iJUST mini sub-ohm tank if you have one.