In order to guide a (elastic) cable, you may also use a round button. A round button is made of black plastic and is available as a symmetrical and a-symmetrical version. Different sizes are also available: 24 or 25 mm.
Round knob Ø24mm
diameter Ø24mm type round knob for elastic cable Ø6mm + Ø8mm
Round knob Ø25mm
diameter Ø25mm type round knob for elastic cable Ø6mm + Ø8mm