This is a simple (and also quick and dirty) design made in Blender. I wanted some speaker wire management that goes under a tile bar in my living room area. It's meant for out of site areas where you can put screws into it.
I didn't worry too much about aesthetics, since it is out of site. 0.30mm might be good enough. I like smaller parts to be stronger, so use your discretion on infill based on what type of cable it's holding.