About microneedle roller Microneedle roller contains 192 very fine medical grade stainless steel tiny needles in eight rows, can be performed on the skin of any part of the body including the scalp.Its application principle is by way of the stimulation the dermis layer of collagen and fibroblast proliferation, because of microneedle stimulation, may remove the wrinkle and the improvement skin texture, lets the skin tightly young, may use for to treat the scars and the stretch marks. 1) one. 0.2mm, 0.25mm, 0.3mm Scope: whitening, moisturizing, light spot etc. 2) two. 0.3mm and 0.5mm
