These airflow regulators fit on/in a 32mm PVC tubes.
I created a dryer system for my scuba boots and gloves with 32mm PVC tubes.
With these outlets I can regulate the airflow or close tubes which are not in used.
The inner-part fit into, for example, a 90° bend with 32mm inner diameter. (I added one layer of electrical tape to fit them tight into the tube)
The outer-part just fit over a 32mm tube (if needed use one layer of electrical tape on the tube to tighten them)
The turnable regulator parts fit inner and outer parts. I uses 4mm bolds and nuts to assemble them.

Creality

CR-X

Doesn't Matter

No

0.2

Slow first (8mm/s) to get the small parts correct on the plate.