... parts list provided by customers * PCB board made, circuit board parts purchased by us * PCB board with parts assembled * Electronic testing ... support Red,White,Yellow,Blue,BlackSilk ScreenDouble-sided or single-sided in white,yellow,black,or negativeSilk Screen Min ... ,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal ...