... therapy uses a knead rod inlayed with 192 slender steel Needles, accompanying with functional nutrition liquid, regularly rolling in the places ... Body: diameter 20mm X width 14mm* Disc: 8 Microneedle Discs* Needles Disc: 24ea ( total needle: 192 per each other)* Needle Material ... , 2.0, 2.5mm ( Use for solutions of thick wrinkle, large pore, injury scar, pimple scar, severe decline of elasticity)