200 single Fine medical titanium needles. How to clean the DermaRoller -Soak about 5~8 minutes with 75% alcohol, or use ultraviolet to disinfect for 45mins -Please store it carefully,it should be placed out of reach of children! -All dermaroller are disposable and personal use,do not share with other people Used Method 1. Clean your face in common way. Clean the dermaroller. 2. After about 15minutes, put micro-needles end on your face and make it roll on your face. 3. Do not use it in heavy press into your skin,in mild pressure! 4. Clean the derma roller after use. store it in dry & clean place. What is a derma roller? The needles are used to make tiny pinpricks into the skin. The pricks penetrate into the dermis just deep enough in depths sufficient to stimulate the production of new cells and boost circulation albeit without causing skin damage or intense pain. This device not only treats hair loss by inducing the production of collagen in the skin, but it also is excellent for eliminating imperfections on the skin.