... &fast delivery. Welcome To Rigao ElectronicsShenzhen 1-22 layer FR4 PCB board and Aluminum PCB with RoHS and UL certificate - Contract Manufacturing- ... around 1. Double-Sided FR4 material 1 oz copper pcb board 2. Green solder mask, Immersion gold 3. with Competitive ... Free,Rogers,Arlon,Taconic,Isola,PTFE, Bergquist2). Surface Treatment: HASL,HASL lead-free,HAL,Flash gold,immersion gold,OSP,Gold Finger ...