re high in silicon and iron content, which can keep warm for 25‑35 minutes, longer than most stones, you can also enjoy a longer massage with temperature. 2. 10 Minutes: Our massage hot stones can be heated quickly without water, which is fast and convenient, and can be heated without anyone, and it only takes 10 minutes to heat. 3. Basalt: This hot stone massage set is made of round natural black basalt. It has a beautiful shape and can attract your attention. It is very comfortable to massage. I believe you will be satisfied. 4. Therapeutic Relief: This basalt massage stones set can relieve pain from sprains and strains, release stress, and be able to enjoy the comfort of a massage. 5. Choice: Our hot stones massage sets relieve muscle tension, soreness and stiffness, and it's also ideal for athletes, home care and spas to massage to relax after a day of intense workouts.   Specification: Item Type: Hot Stones Material: Basalt, logs Product Quantity:  4pcs 8 x 8cm / 3.1 x 3.1in power stones, 4pcs 8 x 6cm / 3.1 x 2.4in power stones, 8pcs 3 x 4cm / 1.2 x 1.6in power stones Characteristics: No wax, no oil, original ecology Adapt To The Crowd: 1. People who often play mahjong on computer and TV for a long time 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.   Package List: 4 x Hot Stones 8 x 8cm 4 x Hot Stones 8 x 6cm 8 x Hot Stones 3 x 4cm 1 x Warmer Box