... ”PCB Boards with UL, ROHS, SGS certificateTop quality, competitive price, OEMRequirements for quoting purposeGerber File if haveBase Material, Layers, Copper Thickness, Board Thickness ... -30 layer2MaterialFR-4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,FR-1,FR-2,Aluminum3Board thickness0.2mm-7mm4Max.finished board side500mm ...