The Vulcan RDA is a three-piece design dripping atomizer that was built from a foundation of functionality and quality: A top and bottom heat fins that make sense! With the bottom base/fin carved out of a single solid piece of stainless steel, heat-dissipation has gone to a whole new level! No more over-heating MODs due to long draws. A unique air-vent and AFC design that brings the vents closer to the coils. Super-deep juice well that under passes the two side posts allowing maximum space utilization.