... free Materials(RoHS Compliant)/CEM-3/CEM-1/AluminiumLayersingle layer,double layer,multi-layer(4-10)Board Thickness0.3mm-3.0mm,+/-0.1mm(tolerance ... ,yellow,black,white(LPI/MATT.,UL 94 V0 approved) Surface Finish HALtin height≤0.05mmENIGNickel 3-7um,gold:0.5-0 ... ) Certificate SGS,ISO,ROHS,UL, Welcome to visit WALBOND ! 8 Layer digital cameral circuit boards