UPDATE: Large wire clip updated with added strength!
I recently got the Tevo Tarantula 3D printer, but I wanted to customize some of the cable management to my liking, so I created these 3 wire clips. The small one has an internal diameter of 7.5mm, the medium one has an internal diameter of 10mm and the large one measures 15mm for the internal diameter.
I included the separate .stl files for each piece, along with the sketchup file containing all three. I also attached a few pictures of the wire clips "in action". They are snap-in wire clips, so all you have to do is ... snap them in.
The small and the medium one sit quite well on the rail, the large one is a bit wobbly, but that one's reserved for a lot of wires that need to pass through it.
I printed the pieces with a 0.2 mm nozzle, using standard speed settings in slic3r. The layer height is set at 0.16mm and there's a 6mm brim around each piece. Also, the cooling fan is enabled by default, but I guess you could also print them without a cooling fan.