I remember trying to ship a strut mount from my parts car to New Zealand and found out that I wasn't allowed to ship steel to New Zealand.
I took it to the post office and asked about it, and said it's mostly magnesium alloy, but the brackets on the end are steel.
She looked it up and said that your not allowed to ship wooden products either.
I said that makes sense, you don't want to ship any bugs, but what's wrong with steel if any other metal is fine?
She finally just shipped it for me because it just didn't make sense.
I shipped by boat because it was the cheapest, then Covid hit during the journey and it took two months to get to New Zealand.
I was thinking maybe the iron in the steel could mess with the boats compass and the mail would get lost at sea ??
I hoped they had a sextant and a pocket watch in case they get Really lost?
Two weeks later I read through the regulations for the umpteenth time and noticed that I'm not allowed to ship "steal" to NewZealand,..
Steel is fine to ship.
So,..
I can mail one of your chain rings to New Zealand.
If a magnet sticks to it, I'll need to check it for prints as well.