... -7.0mmMaterial:FR-4,CEM-1,CEM-3,High TG,FR4 Halogen Free ,Rogers,HF,NELCON,TACONIC ... Surface finish/treatment:HASL /HASL lead free,HAL,Chemical Gold/tin,Immersion Silver/Gold/Tin,OSP,Gold ... HDI PCB ,PCB of single,Double and Multi-layers,High frequency PCB ,etcPackingInner :Vacuum packing/Plastic bagOuter : ... you have any interests in our products. High-precision Immersion Gold PCB board and fpc board