The Vandy Vape Berserker(BSKR) V2 MTL RTA features the variable setting of the bottom airflow with 6 sizes(2.0,1.6,1.4,1.0,0.8,D-1) of airflow tubes. There are totally two tubes and three drip tips in the packaging for your option. Comes with a capacity of 3ml with the Resistance of 0.74ohm. Quick links: Vandy Vape Berserker V2 RTA Glass Tube Vandy Vape Berserker V2 RTA Airflow Tube Main Features: 3ml PEI & Glass tube, New comfortable design of refill cap New base design supports building single