Cable hole plug

I have a hole in my desk that I use to pass some cables through, but I wanted to close it off to prevent other things from falling down through the huge hole. The problem was the hole was an odd size (to me): 60mm in diameter. I created this thing to solve this need.

In addition to the STL file, I have attached the native FreeCAD file (it's a really simple design) and a STEP file if anyone wants to use them.