desk shelf (hanger)

you need 3 more things is a wooden or plastic board about 2 feet long or less, if you want it longer I recommend add 1 more hanger in the middle if you plan to put 20lb or more on it , 2 bolts about less than 11mm and 2 screws about 1.5-2 inches long for it.

PLA is good in general but something like ABS is the best for something heavy