1.FR-4 green color solder mask single side pcb bare ... board. pcb RODUCTION CAPABILITYSolder Mask Types: Green, White, Blue, Red, Matt Green, Matt Black etc.Surface Finishing: ... Gum; Immersion Gold+ OSP. ItemSpecificationsNumber of Layer1-12LayersMaterialFR-4, AL PCB, CEM-1, Taconic, RogersFinish Board Thickness0 ... Impedance+-/10%double side pcb] FR-4 green color solder mask single side pcb bare board