... mcu design,prototype Welcome to Hangzhou Singo Tech Co.,ltd.Hangzhou Singo Tech Co. Ltd, located in West Lake technology park in ... 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 ...