I have a Ryobi P3240 3 gallon shop vac with a 1.25" hose end.
I picked up a Milwaukee Air-Tip vacuum attachment that's advertised as being compatible with 1.25", 1.875", and 2.5" hoses but it didn't fit securely onto the 1.25" hose end of the Ryobi shop vac.
I think the hose end is too short and possibly meant to only work with Ryobi accessories so I printed this adapter to make it fit around the 1.875" connection.
Should work with any other Ryobi shop vac with the 1.25" hose end or other brand vacuum hoses with the same problem for any 1.875" accessory.
Let me know if you have any issues with fitment along with the make/model of your vacuum and the attachment that doesn't fit and I can update the model or add a variant.
My general print settings:
Printed in PETG
3 wall loops
2 shell layers
15% Gyroid infill
0.3mm layer height
0.4mm nozzle
I oriented my model with the smaller inner diameter (1.25" side) against the build plate but it would probably print fine the other way too.
The author marked this model as their own original creation.