The Derringer RDA is one of the most popular rebuildable atomizers for drippers who want to keep their setup compact. It is 22mm wide, and the shortest height you will find on the market, with a wide bore drip-tip as part of its top cap. It has a variable "vortex" airflow ring that allows for single and dual configuration, three building posts with large screw holes for an easy build, and a deep juice well. This 1:1 clone comes from Wotofo, reputable makers of the original Troll and Freakshow RDAs, so you know the quality is there, and is made of stainless steel, with a glod plated copper centerpost. Includes replacement o-rings, screws, and allen key.