The Uwell Valyrian 3 Sub-Ohm Tank has a 6ml tank capacity, Tri-slotted airflow control ring that allows users to adjust the amount of airflow that rushes through the epicenter of the coil, and is comapatible with all the Valyrian coil series from the Valyrian I to the Valyrian III. This tank is constructed from a durable stainless steel with top of the line craftsmanship.