... include blank pcb, single sided pcb,double sided pcb,multilayer pcb,flexible pcb,fr4 pcb,fr2 pcb,fr1 pcb,cem1 ... size 0.0008” (0.02mm) Aspect ratio 20(5:1) Solder Mask Color green,light green,white,black,dark brown ... ( 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! 1.6MM thickness copper clad Single Side PCB Boards