This device is designed to sort cables inside its lip. The bottom is flat to the used in the wall with double contact tape.

Inner diameter: 10mm
Outer diameter: 13mm
Base width: 20mm
Piece Length: 100mm and 20mm available

This is a work in progress and both my first attempt with Fusion360 and my first upload in Thingiverse.

Monoprice

Select Mini

Yes

Doesn't Matter