... Microneedle therapy * Derma Roller Size:0.2mm, 0.25mm, 0.3mm, 0.5mm, 0.75mm, 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm Portable Microneedle Derma RollerI. Theory ... Medical purpose (stainless steel)* Body Material: PlasticFor skin regeneration1.0, 1.5mm ( use for solutions of thin epidermis, thin wrinkle, ... anti-aging& rejuvenation of ruined skin1.5, 2.0, 2.5mm ( Use for solutions of thick wrinkle, large pore ...