The new Black Sub-Herb vape tank is a one of a kind new and advanced dry herb vaping device. New changes from the original sub-herb include a gold plated 510 connector, new spring and plate to hold the dry herbs and flowers down when puffing, new and better air flow as well as maximum heat is 65 degrees hotter. Convert your current vape battery into a superior dry herb vaporizer simply by attaching the Mig Vapor Black Sub-Herb vape tank. It is that easy.