1)192 needles and 540 needles. 2)used for :wrinkle, aged skin, acne scars,large pores. HOT! Portable Mts Microneedle Derma Roller Theory of Microneedle TherapyMicroneedle therapy uses a knead rod inlayed with 192 slender steelneedles,accompanying with functional nutrition liquid, regularly rolling in the places which need to cure, it can puncture more than 250,000 micro vessels on the epidermal ...