Digiflavor Siren MTL RTA V4 is an excellent RTA compatible with all 510 thread device. It can hold 2ml e-juice capacity(Replacement Glass Tube is included in the package). With center-located honeycomb-style airflow holes, Siren MTL RTA V4 allows the airflow to come up straight under the coil. Featuring leakproof bottom airflow system and semi-hidden AFC structure, it would bring dense clouds and flavorful taste. Single-coil two-post style deck enables an easy coil-building and leaves enough spaces ...