Hastur RTA from Cthulhu is designed for mouth to lung and restricted lung hit vapers. It's a single coil atomizer with raised build deck and easy locking big posts. It comes with 5 changeable air flow resisters for the precise airflow intake. The Hastur adopts easy top filling and adjustable bottom airflow. It has clear and frost glass tubes as well as two 510 drip tips. This has a 3.5ml capacity for e-liquids.