This is a rather simple print to mount the power supply that came with the Creality Ender 3 Pro in the back under the heat-bed.
It prints comparably quickly and doesn't need any supports.
This thing leaves the psu terminals exposed! Please also print a cover for those terminals!
There are several already available here on thingiverse.
The author marked this model as their own original creation. Imported from Thingiverse.