Layer Counts:2-16 layer PCB Base materail:FR-4、High Tg Fr4、High Frequency board(Teflon、Rogers)、Halogen free。 Board Thickness:0.2mm--6.0mm CNC tolerance: + - 0.1mm Min Line Space/Width: 4 / 4 mil Min Hole Size: 0.25 mm Surface Finish:HASL、Immersion Ni/Au、Enig、OSP、Gold Finger and so on.