Lid raisers for the K1 Max help improve the clearance between the drag chain / filament tube and the glass top as Creality have designed it very very tight. The vents allow you to help prevent the temperature becoming too high inside the printer depending on the filaments you are printing.
You will need to print:
Corners, FrontBar and VentBar print vertically with supports, but the VentSlats can be printed flat on the bed. Everything is press-fit.
The author remixed this model.
This is based on the model by Tony F, but makes the vent slats slimmer and removes the Creality logo from the front. My vent slats were binding so I made them a bit slimmer, making them easier to use and I didn't want the big logo on the front, right above the other logo.