Detailed Product Description multi layer pcb,PCB,rigid pcblayer: 4 layerThickness:1.0mmSurface Finish: immersion gold Copper size:1 oz Solder mask :GreenSilkscreen: whiteMaterial:FR-4Min.hole size: 0.1 mm(4mil)Min.line width/space:0.1mm/0.1mmSpecial technique: Blind&buried All of our products according to UL,ISO9001,ISO14001