Multilayer PCB Circuit Board for Wireless Router Product Details Product Name: Wireless Router Circuit Board Material of Board: FR-4 Number of Layers: PCB multilayer board Min.Hole Size: 5 Mil Solder Mask Color: Green Minimum Line Width and Line Moment: 0.2mm * 0.15mm Surface Treatment: lead free tin spraying Thickness of Finished plate: 1.2mm Outer Copper Thickness: 1.0oz Character Color: White