1, controller board with red oil 2, experienced design and copy service 3, fast delivery 4, strictly QC control PCB ... of printed circuit board assembly1Layer1-30 layer2MaterialFR-4,CEM-1,CEM-3,Hight TG,FR4 Halogen Free,FR ... packing,Plastic bag12Outer packingstandard carton paking13Hole tolerancePTH:±0.076,NTPH:±0.0514CertificateUL,ISO9001,ISO14001,ROHS,CQC,SGS15profiling punchingRouting, ...