This is a mounting bracket to hook a VESA-capable monitor to an Ikea Vitval bed desk. Print the model, screw it to the back of the display and slide on the desk's top bar.
I printed it in PETG and oriented on its side with 4 perimeters (see attached image below) as I believe it provides better structural integrity. Also added supports and brim for better bed adhesion.
The author marked this model as their own original creation.