Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5079635.

Remix of wwendorf's extremely useful cable clip for Misumi 1515 extrusion. I wanted a second, separate channel for wiring for my LED lighting kit and for anti-crash kit

Z-axis can be scaled to adjust desired.

This thing is intended to print on-end so consider using a brim based on height. I found 1mm of brim per 10mm of Z height above 20mm seems to work well.