Preparing to move, I found this together with the papers I got when I bought my bike. But what is it? Is it important?

what is this?

It is about 2cm long.

I have four of these... Maybe related to the disk brakes? I was hoping they could be pad spacers, but that might just be wishful thinking.

  • 1
    Even though its a perfect duplicate, I still learned something. Welcome to the site!
    – Criggie
    Aug 7, 2018 at 19:45


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