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  1. I was so puzzled when mine fell on the floor one day.
    It goes at the bottom of the seatpost. It’s an endcap for the bottom of the seatpost. It can pop out sometimes when you pull the seat up too hard.

    I just checked, mine is gone 😀

  2. Someone suggested using silicone tile sealant to prevent the bung from falling. Has anyone tried that or any other fix?

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