... 4.Payment terms:T/T,Paypal High quality printed circuit board Welcome to Eastwin! Our PCB board manufacture and PCB assembly service: o ... PCB Number of Layer1,2,4 or 6,upto 18 layerOrder Quantity1 to 50,000Board ShapeRetangular,round,slots,cutouts, ... 0.25mm, or 10milsSurface FinishHASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10%Copper Weight Tolerance± ...