... .008”±0.004”(0.2mm ±0.1mm)4-layer:0.01”±0.008”(0.4mm ±0.1mm)8-layer :0 ... .01”±0.008”(0.4mm ±0.1mm) Bow and twist < 7/ ... .02mm) Aspect ratio 20(5:1) Solder Mask Color green,light green,white,black,dark brown,yellow,red,blue Min. solder ... pcb,kindly contact me for more details! 1.6MM Thickness ,LED car light,FR4 Single Sided PCB