Dyson V10 filament bag suction adapter.
Note (late Jan 2024) - There is an inherent wide gap between the inside back plate and the cylindrical tube structure in the original design. This meant there is never truly strong suction when in use with the Dyson. I had to cure some high viscosity super glue from Harbor Freight to fill that gap. Worked really well thereafter. No more using hand pump to evacuate air from filament bags! :-)
The author remixed this model.
Credit to @monokeith as the V10 connector came from his Dyson V10 short tool (https://www.printables.com/model/145703-dyson-v10-short-tool/files).
This fits the Dyson V10.