fan duct connectors (multi-sizes)
thingiverse
4 and 8 inch outer diameter duct connectors with 1.5 inches of height for hosing. The holes are 1/4". Update: It printed great on the first try. Ensure that if your printer does a test print line in the beginning (like my ender 3), you remove that strip prior to the print continuing. Otherwise, it fits my 8" duct perfectly snug! See picture.
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