When working on my car, I took the intake manifold off and annoyingly some debris dropped into the intake ports. I tried to get my Karcher wet/dry vac to clear out any bits and pieces but the 35mm hose doesn't allow great access.
This attachment is made to just slide over a 35mm vacuum tube and should allow the vacuum to clear confined areas. Narrow section is 8mm diameter with 2mm wall, and is 150mm long to get in those really tight spaces.
Haven't tried it yet as it is still printing, but hopefully it is successful and performs the task needed of it.

Ultimaker

Ultimaker 2

Yes

No

0.15

100%

Needs to be as airtight as possible. Made to attach onto a 35mm hose. Can be scaled for larger/smaller hoses.
Print vertically in order to keep circumference circular