Share the profile for this nozzle made by nemo404 very useful for the air assist of the laser.
Air input diameter is 5.4mm
source - 2x CT-404 silent aquarium air pump https://s.click.aliexpress.com/e/_A5xOJI
Nozzle mounted on laser: https://www.youtube.com/watch?v=1_uj2vYmHmM
Step files: https://drive.google.com/drive/folders/149SZfH74vCJeP18MVcamqRjwQk5hhQL1?usp=sharing