... PCB design· FR1 Single Sided PCB with Peelable Mask, V-Score. · FR4 Single Sided PCB with Red Solder Mask, HASL Finish, Contour ... 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 ...