FR4 Material PCB, 2-Layer, OSP, Black Solder Mask,RoHS Compliance. FR4 PCB,2-Layer,OSPBlack Solder ... )8 layers - 32mil (0.8mm)10 layers - 40mil (1.0mm)Max Board Thickness200mil (5.08mm)Min Line Width3 mil (0.075mm ... , Immersion Tin, Immersion Silver, OSP,Gold Finger, Peelable Mask, Carbon PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 2Layer Black Solder Mask PCB