Best RDA of 2017 according to Vapingwithtwisted420, Heathen & Mike Vapes 4 large post holes allowing for easy coil placement, and maximum build space with open access to trim excess. Stepped airflow design provides precise control while maintaining an ultra smooth and whistle free experience. Deep and spacious juice well with perfect post placement allows for leak free convenient dripping access. Locking top cap guarantees perfect airflow positioning which makes adjusting airflow much easier. Conical shaped top cap provides smooth and uninterrupted airflow. 2 different sized 810 drip tips and a 510 drip tip adapter included for personal preferences. Removable gold plated positive and negative posts. Standard 510 pin and Raised BF squonk 510 pin is included.