The DynaVap M is our most popular battery-free dry herb vaporizer and has no electronic parts that can fail. This portable vaporizer gives you the freedom to use your device practically anywhere with any independent heat source, but for optimum flavor, we recommend a butane torch or Induction Heater. Designed to be used with dry herb or concentrates (DynaCoil adaptor sold separately), the M herbal vaporizer is more efficient than smoking because the M heats the material at a lower temperature producing consistent and flavorful vapor all while stretching your stash. This product provides a distinct vaping experience.Made entirely in the USA from medical grade stainless steel. Notched dosing chamber functions as a built-in grinder. Adjust-a-Bowl feature allows you to adjust the size of the dosing chamber to your needs and is ideal for microdosing. A contoured design for easy gripping Airports for manual airflow control. Tapered mouthpiece fits snugly in 10mm female water piece openingsCo