Used these to support a shelf on a table I was making (don't ask, I have lots of random hobbies). Anyway, they turned out great and have no issue in supporting a lot of weight. I don't have any pictures but I printed these in white PLA, since they're not going to be visible.
great sample pack for 2020 extrusions id recommend jus printing the one u want /need and multiply them on one print bed save the filament and time or if tour unsure what one you want this is the one for you