Skin tighten and Collagen stimulation therapy. 1. Please sterilize the roller and the nursing part with alcohol. 2. Please apply suitable nutritional lotion/cream on the skin, rolling back and forth 4-5 times. 3. Please rolling more than four different directions, refer to the pictures. 4. Apply nutrition or mask products on the skin that requires care in case of skin inflammation. Size : Care Instructions : 1. Only for personal use, don’t share with other person. 2. Skin with wound should not use this roller. 3. Be careful if the client is allergic to metal. 4. Irritation cosmetics is forbidden before the skin recovery. 5. Put where the children can’t touch.