Uwell Crown IV Tank is an upgrade on the Uwell Crown III Tank. This innovative design boasts a stainless steel construction, easy access top-fill, as well as a “Self Cleaning” technology that absorbs the eliquid caught in the condensation holder. The Crown IV Tank utilizes the dual SS904L coil in 0.2ohm and 0.4ohm as well as the double helix mesh coil, perfect for even heat disturbution. The adjustable bottom airflow is perfectly suited for this state-of-the-art sub-ohm tank and works perfectly when paired with any high wattage mod.