The vacuum attachments provided with the router did not fit my Kärcher vacuum cleaner. The Kärcher has a 35mm hose, while the router attachments is ~36mm, so it didn't fit in or around the attachments.
This model allows the 2 to connect properly.
Printed in TPU 95A for a proper seal and some flexibility, but my prototype was printed in PLA, which seemed to work quite well too.
The author marked this model as their own original creation.