1.selectivity immersion gold Plating Pcb 2.UL ,ROHGS,SGS,ISO ... Diameter0.01'',0.25mm, or 10milsSurface FinishHASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance ... thicknessDesign File FormateGerber RS-274,274D,Eagle and AutoCAD's DXF,DWGPCBA assemble capability QuantityPrototype&Low Volume PCB ... perseverance to stick to it. selectivity immersion gold Plating Pcb