... 3.quicker delivery; 4.better logistic service; 5.UL,SGS,ROHS,ISO9000. We can manufacture PCB in ... AluminiumLayersingle layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance)Copper ... green,blue,red,yellow,black,white(LPI/MATT.,UL 94 V0 approved) Surface Finish HALtin height≤ ... 2%(tolerance) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! blank printed circuit boards pcb