Attached are nozzles with a coupling part used in Dyson vacuum cleaners (e.g. DC37):
Additionally, the DysonInterface file (STEP, f3d) contains a coupling part that can be used to create other nozzles. The shape of coupling part is optimized for 3D printing without compromising functionality.
Print settings
Additional remarks
The car nozzle model is slightly improved from the photo - the coupling part is rotated 180 degrees.
Model of thin round nozzle has six relief holes not existing in printed part.
The author marked this model as their own original creation.