The clearest example is the one-piece door handle and latch, 3D printed on an Ultimaker 2 with pink Ninjaflex. It is fully functional but has no moving parts (besides itself) and has no assemblies.

This 3D printed door latch can be unlocked with a PIN code, yet doesn’t require electricity By Dyllan Furness Published March 8, 2017 Save You won ...

The results from your 3D printer may be improved if you use a dedicated enclosure for the job. This is particularly helpful for printing certain materials which are more sensitive to cold drafts or… ...