The CE6 clearomizer is a bottom fill tank with a 1.6ml capacity, it is also has replacable bottom coils/atomizer heads. Replacement atomizer heads for the Diamond Mist CE6 Clearomiser replaces the burned out element of your CE6 with this product to get your Clearomiser up and running again. Saves money on buying a new Clearomiser. Newer Bottom Burn Coil (BBC) Design to reduce coil burn. On average will last the user 14-20 days before the coils/atomizer heads will need to be replaced, however, this is dependant on the users vaping style. Available in 7 Colours.