thingiverse
This is a Button thing that you can clip a headphone cable into to keep it tidy
One STL file is the button sized at 13mm diameter, 4mm thick and the cable groove at 3mm diameter. The other file is 13mm by 3mm with a 2mm diameter cable groove.
Instructions
Using Creo Elements. Came up with the idea but still haven't printed it.
Direct link to the original creator's page
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, this model is available as a free download on thingiverse. Some creators accept tips or donations.
Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.