... Tin/Lead, copper, Nickel and Gold Thickness: 1.0mm, 1.2mm, 1.6mm selectable Cu thickness: 2.5OZ Solder mask: PC401 ... visual inspection and E-test Workmanship compliant with ISO9001: 2000 ROHS Compliant1Layer1-22 layer2MaterialFR-1,FR-2,FR-4,CEM-1, ... battery,fire alarm,CCTV, wireless communication,telecommunication, networking, printer and house controller 2 Layers and 2.5oz PCB with E-Test(PCB board )