... professional pcb manufacturer ,our products include blank pcb, single sided pcb,double sided pcb,multilayer pcb,flexible pcb,fr4 pcb,fr2 pcb,fr1 pcb,cem1 pcb,cem3 pcb,aluminum pcb,etc. pcb board 1 ... (4 mil)Solder Mask Thickness0.0007"(0.018mm)HolesMin Hole size (CNC)0.2 mm (8 mil)Min Punch Hole Size0 ... .9 mm (35 mil)Hole Size Tol (+/-)PTH:±0.075mm;NPTH: ±0.05mmHole Position Tol± ...