FREE NEXT DAY DELIVERY*The Zephyrus sub-ohm vaping tank by UD is a truly high quality tank which looks to add a little extra to the sub-ohm craze. Featuring a huge 5ml tank, a great 0.3ohm coil and impressive airflow, the Zephyrus is something special. This is a sub-ohm tank meaning it uses lower resistance coils. Therefore should only be used by experienced users. The tank will only work with devices capable of firing sub-ohm atomizers and coils. If you have a 0.5ohm coil, for example, the device you use must be capable of firing coils as low as 0.5ohms or lower.