... .21mm-7.0mmMaterial:FR-4,CEM-1,CEM-3,High TG,FR4 Halogen Free ,Rogers,HF,NELCON,TACONIC,ARLON ... PCB,HDI PCB ,PCB of single,Double and Multi-layers,High frequency PCB ,etcPackingInner :Vacuum packing/Plastic bagOuter :Standard ... trust! Good Quality! We passed ISO UL certificates andour products meet Rohs Standards.If our boards are of problem, we ... informations if you have any interests in our products.