Being scottish I was considering using teh cardboard my previous order from Thomann came in but decide to splash out a few more pounds to save me having to measure and cut things.
These boards fit snuggly in the brackets available in the kit. They are solid and keep everything in ther correct place.
If you have a Thomann case and throw lots of stuff in it, these make organising so much better. I have a case that I can now keep 10m 6m, and 3m xlr cables separate. No cross contamination in transit.
Priced well in my opinion. Although you might think getting a bit of mdf cut might be cheaper, the thicness and quality of this and teh fact it fits perfectly is so much worth the pennies you might be able to save.