... , High quality, low cost&fast delivery. Welcome To Rigao ElectronicsShenzhen 1-22 layer FR4 PCB board and Aluminum PCB with RoHS and UL certificate - Contract ... ,FR-4-TG170/TG180,Halogen Free,Rogers,Arlon,Taconic,Isola,PTFE, Bergquist2). Surface Treatment: HASL,HASL lead-free,HAL,Flash gold ...