... :606*530mm(board thickness>1.2mm)F, Six layer pcb:430*430mmG,Eight layers:430*430mmH,more than eight layers ... - Min. Line Spacing: 4mil (0.1mm)Surface finishing: HASL / HASL lead free, HAL, Chemical tin, Chemical Gold, Immersion Silver/Gold, OSP, Gold plating ... inquiry. Your satisfaction is our pleasure. China High Quality pcb lead free, OSP, HASL, ENIG multilayersPCB from China in alibaba trade