[Super Fine needles]: Needle diameter 0.13mm , which is thinner than human hair. So it is Painless, No scratch on skin and No allergy treatment.n[High Quality Needles]: 20 pins derma stamp with High Quality titanium needle. It does not give any allergic matter. reuse design, tested by 10000 times of tapping.n[Pressing to deliver Nutrition Design]: Delivering skin care serum, skin problems treatment cosmeceutical and hair growth solution into the dermis by lightly tapping.n[Microchannel for nutrition absorption]: Derma Stamp Microneedles penetrate the skin, create a lot micro-channle, stimulating the production of collagen and elastin, with greater nutritional absorption.n[Note]Only for personal use, Donu0026#39;t share with others.n