18pcs Heated Rocks Massage Stones Muscle Relax Therapy Basalt Hot Stone with Warmer Box 220V AU Plug Item Type: Hot Stone Material: Basalt, Log Quantity and Size: 4pcs Hot Stones: Approx. 7 x 7cm / 2.8 x 2.8in 6pcs Hot Stones: Approx. 8 x 6cm / 3.15 x 2.36in 8pcs Hot Stones: Approx. 3 x 4cm / 1.18 x 1.57in 2pcs Hot Eye Compress Stones Characteristics: No wax, no oil, original ecology Adapt to the Crowd: 1. People who face computers and TV for a long time, often play mahjong, and often drive 2. People who are prone to shoulder and neck, low back pain, mental tension, and high pressure 3. People with long-term insomnia, neurasthenia, headache, dizziness, hair loss and memory loss 4. People with insufficient blood supply to the brain, hypoxia, shoulder and neck strain, and hyperplasia 5. People with long term constipation, diarrhea and gastrointestinal discomfort 6. People with irregular qi and blood, irregular menstruation, dysmenorrhea, etc.