I designed this pillar to hold up the sagging corner of my heavy graphics card in my computer to alleviate the stress placed on the PCIe slot. All overhang surfaces on the model are no more than 45 degrees from vertical which means a 3D printer can print this without needing support material. The overall length is 49.2mm and the wall thickness is 2mm. I have provided IGS and STP format (as well as STL) for those that want to modify the length or remove the hollow in a CAD program to suit their own needs.

Alternate version here https://www.thingiverse.com/thing:3297501/