The file 'Bookshelf Support Peg 3D Printer Model' is (stl) file type, size is 2.8KB.
This is a simple replacement bookshelf support peg. You might need to scale it up or down to get it to fit with your bookshelf. I printed this at 100% fill and it seems to be supporting my shelf just fine so far, but I don't know what the weight limit would be, so be careful.
Bookshelf_Support_Peg.stl | 13.2KB |