@Lokki Ahhhhh okay, that makes sense! Thanks for your answer!
Thanks for the link, shama! However, what I'm looking for is the name of the tag; similar to how there is the Circus tag, BullsEye, Midas, RaceTrack, etc.
What NFC tags are embedded into these rings? The smallest type of tag I have is the Midas NTAG203, so I'm interested in knowing what tag was used.
Thanks for reading!