1.materials of needle: Stainless Steel/ titanium 2.length of needle: 10 needles sizes 3.color: red, blue, green, blue LED (Photon) Micro Needle Roller 1.Four LED colors for choices2.With changeable heads3.10 needles sizes:0.20mm,0.25mm,0.30mm,0.50mm,0.75mm,1.00mm,1.50mm,2.00mm,2.50mm,3.00mm4.For face or eyes care Dermaroller therapy: The micro needle therapy to stimulate skin with minimally ...