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 Note Make sure you do not have an allergic reaction to this instrument and do not use on eyelids.
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