Dynavap B [Battery-Free Thermal Extraction Vaporizer - Entry Level]The "B" is DynaVap's low cost, entry level mechanical Dry Herb Vaporizer. Designed with first time users in mind, the B is an excellent entry point into Thermal Extraction Vaporizers and the benefits of vaporising rather than smoking. Vaporisers use heat to lift THC and CBD off the Cannabis Plant material in order to extract beneficial medical compounds without causing combustion of the plant. This avoids the production of harmful carcinogens and