Micro-needle for skin care stainlesspin and titanium alloy needle five kinds of needle lenght, two kinds of package Theory of Microneedle Therapy: Microneedle therapy uses a knead rod inlayed with 192 slender steel needles, accompanying with functional nutrition liquid, regularly rolling in the places which need to cure, it can puncture more than 300, 000 micro vessels on the epidermal within ...