... list provided by customers * PCB board made, circuit board parts purchased by us * PCB board with parts assembled * Electronic testing ... 50,000Board ShapeRetangular,round,slots,cutouts,complex,irregularBoard TypeRigid, Flexible, Rigid-flexibleBoard MaterialFR-4 glass epoxy, FR-4 ... Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ...