These prints work as fully functional adapters for the Karcher VC-3 and similar.
Fit is perfect for my printer even the snap-fit but as usual, your results may vary.
Fusion360 file is included for easy modification.
It's meant to interface with Dronnn awesome, Cyclone Dust Filter https://www.thingiverse.com/thing:2829268. But of course it can be easily modified to attach to other items too!
Be sure to also check out the tool-side I made: https://www.prusaprinters.org/prints/34890-karcher-vacuum-tool
The author marked this model as their own original creation. Imported from Thingiverse.