... 80mm certificate:UL,ROHS,REACH,SGS OEM,ODM HASL four layer pcb board CategoryItemHigh-volume processing capacitySample and small batch processingTechnology ... Greater than 10%less than 10%Thick copper The outer layer copper thickness18mm-140mm(hoz-6oz)18mm-140mm(hoz-6oz)Aperture ... 0.10mmMaximum size600mmX1200mm1200mm-2000mmImpedance Impedance Tolerance±10%±5% HASL four layer pcb board ,4 layer pcb board