OBS Engine MTL RTA is new member of Engine family. It is made of 304 Stainless Steel and features 24mm diameter. The deck supports single coil building, air hits the coil directly from the bottom and produce better flavor. Moreover, the independent structure of deck and base reduces the contact area greatly and reduces the heating delivery to the chamber and bast from the coil. Temperature control excellently. It can hold 2ml e-liquid. Top filling design makes refill more convenient. The RTA features top airflow system and offers MTL vaping experience.