Filament ID Tag

My wife and I wanted to have a cleaner approach to storing our filament. Using a 5-shelf shoe rack, we are able to store up to 50 1kg spools of filament. To make identification of filament type easier, I designed this display tab that allows space for a QR Code label to be applied. Additionally, we wanted some form to identify when we have a spare spool, or if a color is no longer available for purchase. Each filament has a QR code that will take us to the purchase link of that exact filament when we need to reorder. The shoe rack we used can be found on Amazon here: https://a.co/d/0cfn3cU3 I am not sure if this tag will fit on other models of shoe racks.