1.Immersion Gold PCB Printed 2.UL,SGS,RohsCertificated 3.One-stop OEM ... Hole Diameter0.01'',0.25mm, or 10milsSurface FinishHASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance±10 ... for us----Test method for PCBAView of Our Workshop Immersion Gold PCB Printed