The Taste Furious V4 Tank from SMOK features new patented Quadruple Coil Head, Triple Coil Head, and RBA Head, which will bring you a true premium experience. The top refill design makes filling as easy as it gets. The TFV4 tank has improved airflow system, an innovative drip tip, and 5.0ml larger capacity. All these are designed to provide you unbeatable taste and quality.