... , 1.0 oz, 1.5oz, 2.0oz,3.0 oz,4.0 ozSurface finishHASL,Nickle, Imm Gold,Imm Tin,Imm Silver ... , OSP etc.Board materialFR-4 glass epoxy, FR4 High Tg, RoHS compliant; Aluminum, Rogers, etc.Insulation resistance1012 ... strength1.5N/mmThermal stress288°C20 SecondsFlammability94V-0Test voltage50-300V 6 layer high Tg PCB board