Uwell Crown 5 Sub Ohm Tank is an updated version of Uwell Crown 4. It is a 29mm diameter sub ohm tank that presents bright luster and a smooth feel. It features 5ml big e-juice capacity with Patented Self-Cleaning Technology, which is able to reduce juice leakage and lessen the cleaning frequency. And it also adopts quarter-turn top cap design to make adding juice even easier. The filler holes have a silicone check valve to avoid e-liquid leakage and make the filling cleaner. Besides, it is compatible with multiple mesh coils for multiple vape experience. The 0.23ohm single mesh coil(pre-installed) is best for 65-70W, giving you smoothest direct-to-lung vape and rich flavor. And the 0. 3ohm dual mesh coil(included) is best for 50-55W, suitable for a restricted direct-to-lung vape, providing warmer vapor and saturated flavor