Authentic Brompton factory replacement part. Read more.
Replacement part. Rubber bung fits into bottom of seatpost, acting as a brake to prevent unwanted rolling of the bike. Also helps protect bike from scratching or chipping floors.Brompton part QSPBUNG
![Brompton Press Fit Replacement Seat Post Bung (QSPBUNG[2])](https://cdn.shoplightspeed.com/shops/621737/files/13038809/650x650x2/brompton-press-fit-replacement-seat-post-bung-qspb.jpg)
![Brompton Brompton Press Fit Replacement Seat Post Bung (QSPBUNG[2])](https://cdn.shoplightspeed.com/shops/621737/files/13038809/325x325x2/brompton-brompton-press-fit-replacement-seat-post.jpg "Brompton Brompton Press Fit Replacement Seat Post Bung (QSPBUNG[2])")