These are simple clips to hold two cables together. 

Usage examples:

• Computer monitor data & power cable
• Desoldering station heater & vacuum line
• Sound system cables
• … you name it :-)

PLA and PETG work very well. Printed with 10-20% infill, layer height 0.2 or 0.3 mm depending on the look you want (smaller layer height equals smoother look).

On my Prusa MK3S+, printing takes approx. 15 min per clip.

The file names indicate the cable diameters in millimeters: 

• “7+7mm" means two cables with 7.0 mm OD
• “7-5+8mm” means one cable with 7.5 mm OD and the other with 8 mm OD
• … you get the idea.