... Control Tolerance: +/-10%Test Voltage: 10-300VSolder Mask Types: Green, White, Blue, Red, Matt Green, Matt Black etc.Surface Finishing: Lead ... ; Immersion Gold+ OSP. ItemSpecificationsNumber of Layer1-12LayersMaterialFR-4, AL PCB, CEM-1, Taconic, RogersFinish Board Thickness0.2mm-3.2mm(8mil ... ,double-sided ,multi-layer,high frequency,MCPCB,metal-backed PCB,welcome your enquiry. FR-4 single side 1 layer ...