The Wotofo Serpent is a sub ohm tank atomizer features 22mm diameter and 3.5ml e-liquid capacity. The Wotofo Serpent is constructed from food grade Stainless Steel. Features bottom adjustable airflow, can be adjusted easily. The Gold plated 510 contact pin will bring you grate conductivity. Comes with anti-heating drip tip, this Wotofo Serpent atomizer will bring you wonderful vaping experience!