1.Professional pcb Factory,High standard pcb 2.UL,SGS,Rohs Certificated 3.Competitive ... Hole Diameter0.01'',0.25mm, or 10milsSurface FinishHASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10 ... for PCBAOur PCB Assembly ShowsView of Our Workshop China PCB Factory