Detailed Product Description PCB of Single-sided PCB with Minimum Hole Diameter of 0.25mm and 0.3 to 4.0mm Base Board ThicknessNumber of layer: single-, double-, four- and 10-layerCopper thickness: 0.5 to 10ozLaminate materials: FR-4, FR-1 and CME-1Base board thickness: 0.3 to 4.0mmSurface finishing: OSP, HAL, immersion AU, silver, soft Au, nickel plating and gold fingerTwist: 0.5%Insulation ...