Selling these two calibration panels. I made these in my machine shop. The 75 mm one is cast iron angle plate and the 160 mm is some glass filled polycarbonate with an aluminum angle plate backer. Both hand painted.

They worked well with my David scanner.

They are heavy and quite large so shipping might be expensive depending on where you live.

Any questions please ask.

Check my other listings for my scanner rig I'm selling.