... conductivity5SurfacePlated gold,Imm gold,Plate Silver,Imm Silver,OSP,HASL,Imm Tin6Production Size500*600MM,500*1200MM,1200*1200MM7Shape ... andards:GB5488.2-88 Metal-based holeDouble-sided PCB technical conditions International Standard:IPC-A-600EEnterprise Standard: ... etc.)If you need, we will send to you with attachment.Annual turnoverOver USD$100 millionOverall Production24000 square meters ...