... ENIG, Green Solder Mask,RoHS Compliance.4oz Copper FR4 PCB,2-Layer,ENIG4oz CopperGreen Solder Mask,RoHS Compliance.CertificatesULISO9001TS16949ISO14001 ... including warp & twist check) Dimensional Inspection (finished hole sizes, pcb profiles, etc) MicrosectionSolderability Test (245±5ºC; 3-5 ... PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 2Layer Heavy 4oz ENIG PCB