The author remixed this model.
I have added a modification for the shroud to accommodate a reverse bowden tube.
Another suggestion I would recommend is to drill the holes for the screws to 4.2mm, and to insert a threaded insert instead of threading into the plastic itself. Much more secure.
For all the info on the parts required, refer to the original post: https://www.printables.com/model/663948-elegoo-neptune-4-pro-fan-shroud-v4-update
For the reverse bowden upgrade, refer to: https://www.printables.com/model/667034-neptune-4-reverse-bowden-upgrade
Fittings are the same as in the link above