The Creality Filament Dry Box 2.0 has a filament feed port in the back of its lid. It comes with a rubber grommet, which works fine for feeding out the filament bare, but doesn't hold on to a PTFE filament tube very well.
This model is a custom M6 nut which fits neatly in the 8mm hole in the lid with the rubber grommet removed. It allows you to mount a standard PC4-M6 pneumatic fitting in the hole to securely hold a PTFE tube. The back side of the nut has a smaller hole to keep the filament clear of any sharp corner on the back of the metal fitting.
There's also a washer which can go between the fitting and the outside of the lid if your fitting doesn't sit neatly against the outside of the lid.
I printed these in Bambu PETG HF Black on a Bambu P1S on the Textured Cool Plate using the default “0.08mm High Quality @BBLX1C” profile in OrcaSlicer with 100% infill and random seam position. For the washer I used the concentric pattern for the top and bottom surface.
The author marked this model as their own original creation.