Summary

I made this tool for my vacuum cleaner, to "hoover" underneath the cupboards.
(To be honest, I wanted to avoid moving the cupboards everytime ;-)
It fits for vacuum cleaner connection diameter 35mm.
The hight of the mouth part is 16.8mm.
On or more extension parts are needed, depends on your cupboard depth.
I printed this with layer height of 0.244mm, 3 perimeters and infill of 30%, without support.
Please let me know your comments.

Update 2016_01_28:
The part "VacuumCleaner-nozzle_straight" is an alternative nozzle variant (straight).
You can use this instead of the original "VacuumCleaner-nozzle" (curved).

Another small modification for all parts: Orientation corrected to its target orientation for the build plate.