33.9 mm seat post bung which fits into the bottom of the seat pillars / posts stopping the seatpost clunking on the ground when the seat post is lowered / put down.

Designed for standard steel Brompton seatposts as well as titanium aftermarket options.

Note: This seatpost bung will not fit the T Line / Carbon super light seatpost

No tool is required - simply push the bung into the bottom of the seatpost

The seatpost is not included!