... PCB; 2.good quality,reasonable price; 3.quicker delivery; 4.better logistic service; 5.UL,SGS,ROHS,ISO We ... 3/CEM-1/AluminiumLayersingle layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance)Copper ... Tolerance±0.1mmPTH/NPTH Tolerance±0.15mm(dia.=0.4-1.4mm)Pad Tolerance±0.1mm(dia.≥0.6mm ... Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! 4 Layer PCB for dvd decoder board