The vaporization of Oxalic Acid kills greater than 95% mites in your hive! This is an outstanding heavy duty Oxalic Acid Vaporizer at a great price and the one Randy Oliver on his website writes is "One of the highest-ranked models.” This one you'll pass down to your son! The beauty of vaporization is that there is no need to open the hive to treat. No strips or pads to install then remove. Simple, easy and effective. Comes with complete instructions. Oxalic Acid not included.