The SubTank Mini Hybrid Clearomizer from KangerTech gives you the choice to switch between Kanger's Organic Cotton Coil heads and the new Rebuildable Atomizer head. The Organic Cotton Coil head produces a pure taste, and also has a brand new airflow design. The Rebuildable Atomizer allows for easy E-juice filling with an easy rebuildable assembly. The SubTank Mini is a 4.5 ml tank that uses authentic Japanese organic cotton. Convenience is a great feature of the SubTank Mini, but you can easily switch to making your own coils and choosing whichever wicks you want. Features of this Clearomizer include a 510 connection, durable pyrex glass,an extremely durable structure along with a built in enhanced airflow system. Switching heads has never been easier than with the SubTank Mini Hybrid Clearomizer. The tank includes all the materials you need to get started and fully experience what the SubTank Mini has to offer. When you purchase this tank, you get the SubTank Mini, an OCC Sub Ohm 0.5 for direct lung inhale, one OCC 1.5 Ohm for mouth to lung inhale, two RBA 0.5 ohm with a 30W coil, Japanese organic cotton, along with everything you need to put together your new mini tank. You will without a doubt be satisfied with this clearomizer's performance and convenience. Please note that the OCC unit is not compatible with other clearomizers.