I wanted to add a venting system for my PrusaBox to help vent toxic fumes. I took the 80mm model that PrusaBox provides and made it fit 100mm/4inch diameter ducting, like the one I bought: AC Infinity Flexible 4-Inch Aluminum Ducting
I printed this at 0.3mm layer height on a MK3S using PETG. No supports needed but a brim is a good idea. Make sure to rotate the model so that the exhaust hole side is facing up.
The author remixed this model.