My Big Mouth is my version of the large dust collection funnels available. I use this for my router table, which together with My Vent creates airflow in an otherwise closed box in which the router body is installed.
I use the 59.5mm hose connection as I don't have a full size chip extractor, which makes the 60mm flexible hose for my extractor a very tight fit. The mouth is 220mm x 220mm.
The frame can be used as a template and also as an attachment to the inside of the box. My Vent must be installed in the front of the box, My Big Mouth in the back.
My plan is to also use this under my table saw to achieve a similar result.