1. When installing, the raised part needs to be aligned with the groove.
2. We will supply stickers on it for fixing.
3. After installation, insert the seat tube for 6 hours to make it firm.
Name: Seatpost Sleeve 31.8MM For Brompton Size: 34.9mm Transform To 31.8mm Weight: Approx 16g Length: approx 8.7cm Material: PP