... thinkness:1oz base material:FR4 min hole:0.4mm Single layer circuit board· FR1 Single Sided PCB with Peelable Mask, V-Score. · ... FR4 Single Sided PCB with Red Solder Mask, HASL Finish, Contour ... Gold, Peelable Mask, White Legend, Hole & Contour Punched. · FR1 Single Sided PCB with Green Soldermask, Yellow Legend, Hole & Contour Punched ...