Parameteric cable clip

I needed a cable clip for my printer where i could insert an already installed cable without removing it and with a maximum width of 20 mm. Didn't found any so i created this one.

This thing was inspired by [20x20 profile cable clips](https://www.thingiverse.com/thing:990412) from [bundyr](https://www.thingiverse.com/bundyr/about).