This model contains three variants of the rack mounting ears for the Zyxel GS1900-24E. First is the original, which matches the metal ears provided by Zyxel, and is likely too flimsy for 3D printing in plastic. There is a reinforced version which is double the thickness, as well as a version suitable for mounting in reverse.
The original OpenSCAD source is included, should you wish to modify the ears in some way.
The author marked this model as their own original creation.