This is my way of keeping a quick and simple overview of my filaments. The litte Cards are giving me an much better impression how the printed Material lookslike when it is printed. They're much more space eficcient than keeping al the litte Benchys. The three steps may give a hint what the material lookslike when it's iluminated from the back. You can put the cards in the Holder or can put them on a litte chain.

There is a flie for the sample cards and a file for each for PLA, PETG and ABS holder.

Update: I corrected the measurements of the holder an added a holder without text on it