The Drop Solo is the latest game changing RDA designed by Brian from The Vapor Chronicles YouTube channel. It is the single coil 22mm version of the original 24mm and recommended as the best RDA in the industry. The Drop Solo has 2 large post holes allowing for easy coil placement and maximum build-in space with open access to trim excess away. The stepped airflow design provides precise control while maintaining an ultra smooth and whistle free experience. Besides, the deep and spacious juice well holds more e-liquid without leaking too. It has a standard 510 pin and BF squonk pin for squonk MODs as well.