4" duct flange
thingiverse
I fabricated a flange to connect dust collection on my planer, so here it is. Disclaimer: You could probably save time and money by purchasing one of these at your local hardware store, but I'm thrifty. Secures with 1/4-inch hardware.
Download Model from thingiverse
With this file you will be able to print 4" duct flange 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 4" duct flange.