This Orange Acrylic Grinder is Original Equipment Manufacturer (OEM) included with the Volcano Vaporizer (Digital and Classic). Storz & Bickel, the manufacturer of the Volcano, takes pride in having the best acrylic grinder on the market. To follow the construction of the Volcano, this OEM acrylic grinder is easy to use. This volcano vaporizer grinder has very sharp teeth that do an excellent job at grinding up your favorite herbs. You can't go wrong with the grinder that is true to Storz & Bickel's quality and design.