... .540 pieces needles 5.Derma Roller Micro-needle for skin problems as Wrinkles,aged skin,acne scar,large ... of needle . 0.2mm for the improvement of the skin color.0.5mm for fine lines,wrinkles,hair loss ect. ... 1.0-1.5mm for deep wrinkles ,acne/chicken ... pox scar/surgical,sagging skin,cellulite ect.2.0mm for very damaged ,wrinkles skin or veru deep scar ...