Material: Stainless steel. Size: 2.2*3.5 inches Color: Silver. Package includes: 1 x Stainless steel gua sha tool 1 x Black travel pouch Nuanchu Stainless Steel Gua Sha Tool How does it work? Gua Sha is a traditional technique used by Chinese medicine. It is the practice of using tools to apply pressure in a moving manner along the skin to eliminate muscle tension and promote blood circulation in the area. Note: 1. Gua Sha takes a long time to see the effect. 2. The time of each use should not be too long, about 5 minutes. 3. The intensity should be moderate, otherwise it may cause damage to the skin. Relax muscles Relief the pain Brighten skin colour Reduce wrinkles