This covers the end of a 4-inch duct in order to keep critters from crawling into it.
It fits inside the crimped end (the "male" end of a connector or elbow). You could size it up a tiny bit to fit in the larger "female" end of the duct.
You can edit your own copy of this item really easily, for free, on the Tinkercad website: https://www.tinkercad.com/things/56ifQAq6FP2
Update: I'm reprinting this is PETG, my original in PLA started to warp :/
| inch_duct_cover3.stl | 507.2KB |
