The Uwell Crown is a sub-ohm tank with replaceable dual or single coils. The body of this atomizer is constructed with food grade stainless steel, and the juice chamber is made with quartz glass. This utilization of high-quality material makes the Uwell Crown Tank stand out in its class. The Crown Tank can be refilled from the top or the bottom and can be filled to a maximum capacity of 4ml. Each atomizer features an airflow control ring and organic cotton coils for a satisfying vaping experience. Plus, with the 0.25 ohm dual coil installed, this tank can handle 120W!