... .3,0.5,0.75,1.5.2.0,2.5,3.0mm with CE derma roller for skin rejuvenatio ... wrinkle removal acne treatment scar removal0.2,0. ... 0.3,0.5,0.75,1.5.2.0,2.5,3.0mm1, Photon therapy Theory:Biological tissue ... accurate part of skin. 0.2,0.5,1.0,1.5,2.0mm Changeable tip2.specificationReplaceble derma roller 405 ... use 0.2,0.25,0.3,0.5,0.75,1.5.2.0,2.5,3.0mm 3.Contact ...