Funnel for aeration fan
thingiverse
I needed to put a fan on my plexiglass box around my Ender 3. I glued this piece with crazy glue. The dimensions are for this fan (not an affiliate link or anything like it): https://www.amazon.ca/dp/B00G059G86/ I will post the cover I made later. For now it was too tight and I had to use sand paper to fix it.
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