Smok Dual-Coil Cartomizer 510 DCT-2by SmokTech $2.50
These new cartomizers contain two heating coils instead of one to produce more vapor than your standard cartomizer. They have been designed to work great with 3.7V batteries or a HV (high voltage) setup. These cartomizers can hold approximately 25 drops of eLiquid.
Choice between X and XL size