... Surface finish: HASL CE, UL, ROHS approved Specifications:1) Double layer PCB, 1.6MM2) Strict quality control3) Prompt delivery.3) Samples are available ... heat conductivity 4.0w/m °C Alum PCBPCB TechnologyLayer number: 1-20 layersFinished board thickness: 0.008'' ~0.24'' (0.2mm ... , TG170), Halogen free, Alum. ( ) Cu, Iron, ceramic base Double sided PCB / multilayer PCB