... parts list provided by customers * PCB board made, circuit board parts purchased by us * PCB board with parts assembled * Electronic testing circuit ... negativeSilk Screen Min Line Width0.006'' or 0.15mmMax Board Dimensions20 inch*20inch or 500mm*500mmMin Trace/Gap0.10mm, ... ,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal ...