... production. 2, small order quatity accept 3, strict quality control 4, reasonable price 1Layer1-30 layer2MaterialFR-4,CEM ... packing,Plastic bag12Outer packingStandard carton packing13Hole tolerancePTH:±0.076,NTPH:±0.0514CertificateUL,ISO9001,ISO14001,ROHS,CQC15Profiling PunchingRouting,V- ... all sorts of printed circuit board assembly high standard professional flexible pcb board manufacturer