A clearomizer is a tank containing preconceived coils. There are several types of clearomizers and different sizes for all uses. Some Clearomizers have RTA trays to rebuild their own resistances. Major recognized brands such as Aspire with its Nautilus, Smok with different versions of the TFV8, Joyetech and Eleaf with their Cubis and Lemo are available from Jean Cloud Vape.