CAPT calibration cube
thingiverse
Got the idea from @Elproducts, designed in Tinkercad. https://www.thingiverse.com/Elproducts
Download Model from thingiverse
With this file you will be able to print CAPT calibration cube with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on CAPT calibration cube.