... Materials FR-4,FR-1,,FR-2,CEM-1,CEM-3 Board Cutting Max. number of layers 8 Min. thickness for inner layers ... ) V-Cut Depth( residual thickness ) FR-4(1/3+-0.1mm);FR-1,FR-2,CEM-1,CEM-3(1/2+-0.1mm) V-cut ... are confused with pcb,kindly contact me for more details! 1.6MM Thickness ,LED car light,FR4 Single Sided PCB