The Uwell Whirl Sub-Ohm Tank can hold 3.5ml e juice. Featuring Uwell’s exclusive Pro-FOCS flavor testing technology bringing the perfect flavor profile for a satisfying vape. There are two new coil heads available: 0.6ohm Nichrome dual coil and 1.8ohm Nichrome single coil, both will give you a long lifespan also both can work at low wattage which saves power and juice. The whirl tank has a easy top refill design. By easily taking off the top cap you can inject your favorite e-liquid quickly and simply. The bottom airflow adjustable design allows you adjust to your preference whether you like DL or MTL vaping.