... inlayed with 192 slender steel Needles, accompanying with functional nutrition liquid, regularly rolling in the places which need to cure. ... steel)* Body Material: PlasticFor skin regeneration1.0, 1.5mm ( use for solutions of thin epidermis, thin wrinkle, decline of elasticity ... & rejuvenation of ruined skin1.5, 2.0, 2.5mm ( Use for solutions of thick wrinkle, large pore, injury scar, pimple scar ...