510 threaded 3 post Rebuildable Dripping Atomizer. Sealed battery connector, and stainless steel construction. The Atomic RDA Clone features a three post setup and dual air intake holes. The Atomic has integrated AFC. You can adjust the airflow by loosening the top cap, and adjusting the AFC ring to the desired position. All these features, with the smaller chamber and size of the Atomic make it one of the best drippers for multiple configurations from single coil, to dual coils. Phillips head screws for connection on the positive/negative connection posts. The Atomic RDA will work with most 510 style drip tips.