These are wedge shaped mounts for mounting LED light bars that I purchased from here. https://www.amazon.com/gp/product/B01LA7443K/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1
I used them in my Double Stack Ikea Lack table printer enclosure. https://www.thingiverse.com/thing:3711021
One size is 45 degree angle the other is 35 degrees. If you need other angles just ask in the comments.
Wedge_V1_35.stl | 4.0MB | |
Wedge_V1_45.stl | 3.5MB |