31.8mm Seatpost for Brompton Folding Bike Double Section Extended Seat Post

Adapt to Brompton 31.8mm mounting diameter seat pipe; The length of the outer tube is 50cm, the length of the inner tube is 28cm, and the maximum length of the seat tube is 70cm. The outer pipe has a diameter of 31.8mm, the inner pipe has a diameter of 27.2mm, and the diameter at the seat pipe clamp is 22.2mm. The total weight of the seat tube is approximately 430g