Thanks for the suggestions folks but what are all these things , are they three piece units , two piece unit's ? What is an EGO and what brand of clearomiser fits it .
Thanks
This is an Ego "3 piece" setup. As you can see, it's really more than 3 pieces.

This is an Ego "2 piece" setup.

But again, this is somewhat misleading because the tank itself is actually 3 pieces.

The advantage of the "2 piece" Ego is that once the tank is put together, it's a single piece that can easily be refilled, usually by simply unscrewing the mouth piece and pouring more liquid in. Once in a while you have to replace the coil in the tank, but that's as difficult as it gets.
The "3 piece" Ego requires MUCH more maintenance, and is typically more expensive to maintain. You have to constantly fill the cartridges which is more difficult and holds less liquid than the tank. Also you have to occasionally replace both the cartridge and atomizers (head) in a "3 piece" setup where you only replace the atomizer (coil) in a "2 piece" setup.
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