... ; 3.quicker delivery; 4.better logistic service; We can manufacture PCB in higher quality, more competitive price, quicker delivery and better ... free Materials(RoHS Compliant)/CEM-3/CEM-1/AluminiumLayersingle layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm ... ) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! 4 Layer PCB with buried&blind hole