... thickness: 2.5OZ Solder mask: PC401, Green oil mask with double side Surface finished process: Immersion Sn Sickscreen: White ... twist board <0.6% Output with 100% visual inspection and E-test Workmanship compliant with ISO9001: 2000 ROHS Compliant1Layer1-22 ... alarm,CCTV, wireless communication,telecommunication, networking, printer and house controller 2 Layers and 2.5oz PCB with E-Test(PCB board )