1.We stand behind our product, high quality material: hand crafted with certified natural xiuyan jade stone, which contains beneficial minerals to skin beauty and health. We will replace gua sha for free if product break due to crafting defectiveness 2.Ancient Chinese technique, natural, alternative therapy, scraping your skin to promote better circulation. This gua sha board was designed to break up stagnant energy, called chi, reduce inflammation, and promote beauty and healing. 3.Relaxing & tension relief: apply serum or oil on the skin, apply a light to medium pressure, scrape with an upward and outward direction on both body and face. Helps with migraine headaches and chronic pain. Feels refreshing and rejuvenated. 4.Detoxifying & natural face lift: put in the fridge to chill, this scraping tool can be applied on neck, arm, leg, back to help with chronic body pain and to help to reduce inflammation. Healing stone for lung, liver, sinuses and heart. 5.Dimension: 3.4 inch in length, 2.2 inch in width, 0.2 inch in thickness. The tool shaped with a groove that is easy to hold in the palm of your hand.