A good way to tag your storage boxes so that you don't have to remeber what you put in them. The name tags easily slide out so that you can move them around while using the filament. I use standard HDX 7 gallon storage boxes from Home Depot. The 7 gallon containers fit 5 spools perfectly and they stack very nicely. The 4 slot body for the tag holder is to slap on the AMS units as a place holder for your tags while the material is in use. There is also a single slot tag holder that I put directly on the printer as a place holder for material in use on the single spool holder. I will try to add tags for any new material that gets released by Bambu or if anyone has suggestions for another material that I don't have in there. Hope you enjoy. Share your pics if print and like them. Thanks