... scar,pimple scar,severe decline of elasticity,etc) 3,How to use:Follow 3 steps of needling to enhance forming channelsHorizontally ... minutes with 75% alcohol,Or use ultraviolet to disinfect for about 45 minutes.Do not use autoclaves,steam and high temperature sterilization ... always clean5)Store in a safe place out of the reach of childrenSpecifications:Needle material: titanium alloyNeedle length:0.2 ...