Product Care To prevent your body from getting an infection, leave your Micro Needle Roller tool clean after use. Wash your tool with hot water after use, do not use detergent or similar chemicals for washing. To sterilize the tool, you can leave it in an alcohol-based liquid for about 20 minutes. Always keep the tool dry. You can dry it by rolling the tool on a standard towel. Product Features: Dermaroller is a skin care therapy tool. It is effective against acne scars, skin cracks and blemishes. It can be easily applied alone at home. It is a painless method with no side effects. It is easy to apply with its roller design. The needles are made of titanium material. It has a 1 mm thick needle structure and has 540 needles.