If you bought it direct from DT then it’s probably for them to pass it onto customs. They have have had several come through since christmas probably and want to investigate what they actually are.
While I can’t give you a list of what materials, in case I miss something, I would definitely suggest mentioning that they are sterile. So they will hesitate to go opening stuff willy nilly.
I would suggest waiting for input from @amal , @mdanger or one of the other veteran posters here.
Is there a deadline when you need to have the info provided?
Yeah Poland and yeah customs.
4 days after they receive it they will start charging me. 10 days and it will be send back. @amal
Anything special to tell them?
Or just
2 RFID chips
2 NFC chips
Magnet
All metal, encapsulated in glass, 3 in needles.