... 1-20 layersMaterial: FR-4, Aluminium Base, Rogers, Taconic, TeflonFinish Board Thickness: 0.2mm-3.2mm (8mil-126mil)External Copper Thickness ... Solder Mask Bridge: 0.0635mm (2.5mil)Distance Between Line To Board Bridge: Outline: 0.25mm V-CUT: 0.40mmImpedance Control Tolerance ... Layer1-12LayersMaterialFR-4, AL PCB, CEM-1, Taconic, RogersFinish Board Thickness0.2mm-3.2mm(8mil-126mil)Copper Thickness1/2 oz ...