Product Model: Dark Blue 2-Layer PCB Base Material: FR4 PCB Layers: 2 Layers Solder Mask Color: Dark Blue / White Finished Thickness: 1.2mm Copper Thickness: 1oz Surface Treatment: Immersion Gold Min. Trace Width: 4mil (0.1mm) Min. Line Spacing: 4mil (0.1mm) Application: Digital Circuit PCB