A intake funnel/shroud for the print fan with the size 40x40mm.
This one is very oversized and by gradually decreasing the cross-sectional area, the performance of the cooling fan should increase. This is probably not really true but it looks really cool.
I've used this on my Ender 5+ for more than a year. I've tried materials like ABS & PLA.
The author marked this model as their own original creation.