OBS Cheetah III RDA has a high quality 304SS construction and features 25mm diameter. It comes with unique middle airflow design, which makes air hit the coil directly. It supports two-ways to fill e-liquid: drip from the top and bottom feed through squonk pin. What’s more, the Cheetah III RDA has tank temperature control function. The deck supports dual coil building. In a word, Cheetah III RDA is your choice of flavor.