4 Layer Black Soldermask Immersion Gold High TG PCB Board In Panel Format Model Number:XCEPCB001 Shipping port:ShenZhen/HongKong Place of origin ... FR-4, CEM-1, CEM-3, High TG, FR4 Halogen Free, Rogers3Board thickness:0.20mm to 3.4mm4Copper thickness:0.5 ... . Line Spacing:3mil (0.075mm)10Surface finishing:HASL / HASL lead free, HAL, Chemical tin, Chemical Gold, Immersion Silver/Gold, OSP, ...