Window screen corner
thingiverse
This one I made a few years ago when I didn't see anything like it. Anywho, enjoy and take your pick.
Download Model from thingiverse
With this file you will be able to print Window screen corner 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 Window screen corner.