... copper thinkness:1oz base material:FR1 min hole:0.4mm FREE HASL PCB· FR1 Single Sided PCB with Peelable Mask, V ... Mask, HASL Finish, Contour Punched. · FR1 Single Sided PCB with Flash Gold, Peelable Mask, White Legend, Hole & Contour Punched. · FR1 Single ... & Contour Punched. · FR1 Single Sided PCB with Carbon Jumper, Gold Flash Key Pad, Hole & Contour Punched.