I needed to put a 32mm rod between two walls, so i desgned this.
The shape just emerged when i was working on this. Who says simple things can't be fun.
The holder is designed and tested for about 10KG loads. But i think it can bear much more.
I have a 32mm and 35mm but it will fit smaller rods.
To make it strong use lots off shells, infill, bottom and top layers.