... HASL(Tin/lead) board· FR1 Single Sided PCB with Peelable Mask, V-Score. · FR4 Single Sided PCB with Red Solder Mask, HASL Finish ... Black Soldermask, White legend, Slot & Contour Punched. · FR1 Single Sided PCB with Carbon Jumper and Carbon Key Pad, White Legend, Hole ... and Contour Punched. · CEM1 Single Sided PCB with CNC Drilled Holes, Silver Jumper, Slot & Contour Punched. ...