For one of my old racebikes from the early eighties, where the break cables do not lie on the handlebars , i needed a clip to fix them in a stable position. Build for 5.2 mm outer housing. You can simply scale it in your slicer programm.
Update 2018-08-30 STL file: Outer diameter now 5.4 mm and roundet edges so that it snaps easy and don't hurt old outer housing coating.
PLA is ok for me, PETG or ABS would be better.