The Wotofo Flow Sub-Ohm Tank features a sleek stainless steel 316 construction with a 4.0ml e-Liquid capacity tank. The Wotofo Flow features a silver plated 510 contact pin and features a 24mm diameter. The Flow may be filled from the top using the convenient twist off top cap. The Wotofo Flow features dual airflow slots that may be adjusted down to your personal preferences. This tank utilizes Wotofo Flow Kanthal Parallel Dual Coil 0.25 ohm atomizer heads designed for variable wattage, and is also cross compatible with TFV8 Baby Coils. The Wotofo Flow atomizer heads features (12) small wicking holes on the head for easy and fast wicking. The atomizer head also features a mesh cover to help reduce spitback.