... parts list provided by customers * PCB board made, circuit board parts purchased by us * PCB board with parts assembled * Electronic testing ... Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal Slot Width0 ... .12'', 3.0mm, or 120milsV-Score Depth20-25% of board ...