The retractable top filling system makes it incredibly easy to refill the tank. You just need to slide the drip tip back and it reveals the filling port. The airflow can easily be adjusted by turning the control ring with knurled design. 6.5ml version.
New ES Sextuple-0.17ohm Head for Ultra High Power Convenient Retractable Top Fill System Optimal Airflow for Massive Vapor Clouds Detachable Structure for Easy Cleaning