1.selectivity immersion gold Plating Pcb 2.UL ,ROHGS,SGS,ISO ... green LPI,Also support Red,White,Yellow,Blue,BlackSilk ScreenDouble-sided or single-sided in white,yellow,black,or negativeSilk Screen Min ... .01'',0.25mm, or 10milsSurface FinishHASL,Nickle,Immersion Gold,Immersion Tin,Immersion Silver,OSP,etc.Board Thickness Tolerance ... perseverance to stick to it. selectivity immersion gold Plating Pcb