At the bottom of a vertical blind, there are two plastic cord chains with moulded clips attached to the blind vanes over time the little "C" shaped clips break and are not replaceable you have to buy the whole length of chain.

My solution was to design a replacement and it works fine

Cut the old ones off close to the cord without cutting the cord, push the cord into the slot, add a drop of super glue, voila.

I have also uploaded the RS DesignSpark Mechanical file if anyone needs to tweak it

Prusa

I3 MK3S

No

No

0.2

10%

I printed three perimeters to give it a bit of stremgth