This is a replacement mouthpiece for the Herby dry herb vaporizer. The kit includes a complete mouthpiece assembly. The mouthpiece disassembles easily for thorough cleaning. A quick soak in 91% Isopropyl Alcohol for about 20 minutes is a great way to keep the mouthpiece clean of any material buildup. Be sure to rinse the mouthpiece under warm water, then allow it to dry completely before using.