This is Folding door repair kit for Marley door, type Eurostar.
The set consists of three parts.
You use "Spreader" to make the slit in the sliding rail so wide that you can remove the broken "Slider" and put up the new "Slider".
You need "Slider_wedge" to push up behind "Slider" so you can push the Lamellae over the tip of "Slider"
Have made a video where I try to explain how the replay kit works.
any brand Nylon mabye ABS