Layer: 1-22 Layers Material: FR4 Board Thickness: 0.4-6.0 mm Treatment : Lead Free HASL, ENIG, Immersion Tin, Immersion Silver, OSP etc. Treatment Solder Mask : Green, Red, White, Yellow, Black, Blue. We can provide quick turn prototype and small quantity PCBs with short lead time. * The quality of Our products is excellent and stable. * We choose the best material for all our products. * We will send the boards to you by DHL, TNT, UPS, FEDEX and so on to saving the transport time. * For responding promptly, we will reply your e-mail from 9: 00am to 23: 00pm by two shifts.