... 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 & ... , Silver Jumper, Slot & Contour Punched. · FR1 Single Sided PCB with Carbon Jumper, Gold Flash Key Pad, Hole & Contour Punched ...