Digiflavor DROP RDA is designed by reviewer The Vapor Chronicles. It has an innovative 4 large post holes allowing for easy coil placement,and maximum build space with open access to trim excess. The stepped airflow design provides precise control while maintaining an ultra smooth and whistle free experience. And the deep and spacious juice well holds more e-liquids without leaking. It has a standard 510 pin and BF squonk pin for squonk MODs.