... , low cost&fast delivery. Welcome To Rigao PI FPC,flex PCB,keypad fpc --Good quality material and color for your choose--Expert ... -sided, Double-sided, Multi-layers (max 6 layers) andRigid-flexible PCB, Aluminium boardSurface Finishing:HASL(LF), Gold plating, Electroless nickel immersion ... and electricity performance testView of Rigao Factory : PI FPC,flex PCB,keypad fpc