... parts list provided by customers* PCB board made, circuit board parts purchased by us * PCB board with parts assembled* Electronic testing ... circuit board or PCBA* Fast delivery, anti-static package 1.PCB craft capability Number of Layer1,2,4 ... ,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± 0.25 ozMinimal ...