Features:1. Each stone goes through a proprietary treatment process to give you clean, smooth and fully-usable stones.2. The stones are used for hot stone massage therapy.3. Help to promote muscle relaxation, improve blood circulation.4. Apply to face and hand joints, for palm, foot, ankle joints and other parts of meridian.5. Eliminate superfluous toxin, can enhance the immunity ability of the person in an all-round way.Specification:Condition: 100% Brand NewMaterial: BasaltColor: As Pictures ShownSize: Approx. 3 * 4 * 0.8cm/1.2 * 1.6 * 0.3in (0.5mm measurement error)Suitable people:1. People who often play mahjong or drive cars, in front of computer or TV for a long time.2. People who easy to get pain on shoulder, neck and back, mental tension, high pressure.3. People who has long-term insomnia, neurasthenia, headache, dizziness, hair loss and memory loss.4. People who insufficient blood supply to the brain, lack of oxygen, and people with shoulder and neck strain and hyperplasia.5. People who has chronic constipation, diarrhea and gastrointestinal discomfort.6. People who has menstrual period dysregulation, dysmenorrhea.Package List:12 * Massage Stone.