... FR1 Single Sided PCB with Flash Gold, Peelable Mask, White Legend, Hole & Contour Punched.· FR1 Single Sided PCB with Green ... Soldermask, Yellow Legend, Hole & Contour Punched.· FR4 Single Sided PCB with CNC Drilled ... Holes, Black Soldermask, White legend, Slot & Contour Punched.· FR1 Single Sided PCB with Carbon ...