Eyeball vent
thingiverse
This is a 45 degree eyeball for a six inch ceiling vent. you may need to download the free "barbarian units" plug in to get to imperial units.
Download Model from thingiverse
With this file you will be able to print Eyeball vent 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 Eyeball vent.