Small tiles to back up amiibo files.
Made for 25mm NTAG215 NFC Stickers that can be found here:
https://www.amazon.com/gp/product/B078T9DVNW/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

Version 1 was made with SLA/DLP printers in mind.
Version 2 was made a little thicker with deeper embossing for easier printing on an FDM system.