derma roller for skin, beard & hair 0.25mm microneedle kit - microneedling face roll microdermabrasion tool 540 titanium micro needles for facial, body & hair growth - includes 3 ebooks & storage case  - roller length 0.25mm - only used for exfoliation <br> - roller length 0.25mm - only used for exfoliation. facial face roller <br> <br> direcntions: 1. sterilize roller head before and after each use. 2. cleanse your face. 3. apply gentle pressure while