... Cu wight0.5oz ~ 3.0ozLaminate MaterialsFR-4,FR-1,,FR-2,CEM-1,CEM-3Board Cutting Max. number of layers8Min. ... PlatingMin. hole size0.0008” (0.02mm)Aspect ratio20(5:1)Solder MaskColorgreen,light green,white,black,dark brown,yellow,red ... ( residual thickness )FR-4(1/3+-0.1mm);FR-1,FR-2,CEM-1,CEM-3(1/2+-0.1mm)V-cut ... confused with pcb,kindly contact me for more details! 1 oz copper thickness 4 layer pcb