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. Store it as a regular product - 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.