A tool to vaporize oxalic acid (OA) to kill varroa mites. We offer this with free shipping. When you order just choose local pickup and we will ship it to your door. This has been used in Europe for about 30 years it is very effective and has little or no adverse effect on queens or brood. Use 1 gram of OA per deep hive body. Follow all safety cautions as with any product. We had this one made for us; it carries a 1 year warranty. We will either repair or replace if it is defective. It is well built and ready to use. This one is made in the USA.