Derma roller for skin 1.different needle size 2.CE approval 3.safe and clean for use Derma roller system beauty product Factory product,welcome your Brand. A good equipment for smooth your skin!Usage:1.Clean your face in common way.2.disinfection of micro-needles with alcohol.3.After about 15minutes, put micro-needles end on your face and make it roll on your face.4.DO NOT use it in heavy press!5 ...