... Layer, ENIG, Green Solder Mask,RoHS Compliance.4oz Copper FR4 PCB,2-Layer,ENIG4oz CopperGreen Solder Mask,RoHS Compliance.CertificatesULISO9001TS16949ISO14001 ... .1mm)S/M Pitch3mil (0.075mm)Aspect ratio12:1Finished Copper Weight10 ozImpedance Control+/- 5% Insulation Resistance1E+12Ω(Normal) ... PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 2Layer Heavy 4oz ENIG PCB