Uwell CROWN 5 Sub-Ohm Tank, featuring a 5mL refillable capacity, quarter turn top fill system, and pro-FOCS Flavor Testing technology to boost flavor. Constructed from durable stainless steel, the Crown 5 Tank is impervious to light falls and drops without much damage. Holding up to 5mL of eJuice within the bubble glass, the Crown 5 Tank can be refilled by opening the quarter turn top fill system, revealing the silicone check valved fill port. In addition, at the base of the tank is a dual slotted airflow control ring that can be opened or closed fully to carefully meter airflow into the tank, allowing the user to find the ideal rate of airflow for optimal flavor or cloud production. Introducing a new coil series, the Crown 5 tank utilizes Crown 5 Coils, all constructed in a mesh manner to deliver intense flavor and vapor output at lower wattages.