This is a replacement for the 2 hinge pegs in the front door of the "New Age Pet ECOFLEX Jumbo Litter Box Cover End Table" (see images).

Note that, due to its small size, you will probably want to use a printed brim to ensure it sticks to the build plate.

I had to use a small file to remove the smallest bit of thickness from this part. But after less than 5 minutes of post-work, the piece functions flawlessly!