After being disappointed with the stock Ender 3 part cooling duct, I decided to design my own. This part fits directly to the original Ender 3 pro part cooling fan without any extra parts. Simply remove the old duct, and using the screws included with the Ender 3 Pro, install the new duct. This duct helps with TPU printing, stringing, and many other problems that come with the stock part cooling system of the Ender 3 Pro. By directing flow of air to all sides of the part, even part cooling is achieved, which results in a more evenly printed part, with less stringing. Print with very low layer height, .08-.1mm, and print at a 45° angle with strong supports. Post processing is very much needed for this print.