An amazing beauty tool for skin regeneration - The Derma Roller is a revolutionary device which has the amazing ability to naturally stimulate collagen and elastin production in the skin without damaging it. Different needle lengths have different usages 1. Home use: 0.2mm 2. Clinical use: 0.5mm/0.75mm 3. Medical use: 1.0mm 4. Physician use: 1.5mm/2.5mm/3.0mm Cleaning recommendations 1. Soak about 5~8 minutes with 75% alcohol. 2. Using ultraviolet to disinfect for about 45 minutes. 3: Try it on the back of your hand so you can get a feel of the right pressure 4: Make sure your face is completely clean when you start this 5: Never apply force when rolling it on your face 6: Use for 10-15 minutes 7: Allow your skin a few days of rest every week 8: Never use on open pores 9: Submerge roller in Hyrogen Peroxide or Achohol to disinfect. 10: Follow up treatment with a nice moisturizer or vitamin C serum to get your skin looking great