Printer Test balls
thingiverse
i made this thing out of pure boredom. It turned out pretty good for testing bridging. So here it is for all of you to use.
Download Model from thingiverse
With this file you will be able to print Printer Test balls 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 Printer Test balls.