Micro needle derma roller skin roller stainlesspin and titanium alloy needle ... PROFIT TO YOU) Micro needle skin roller derma roller for :skin problems as Wrinkles,aged skin,acne scar,large pores,stretch ... lenght: 0.2mm for the improvement of the skin color. 0.5mm for fine lines,wrinkles,hair ... chicken pox scar/surgical,sagging skin,cellulite ect. 2.0mm for very damaged ,wrinkles skin or veru deep scar ...