... , 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 Jumper and Carbon Key Pad, White ...