Pro PLT 1-Bolt Road Bicycle Seat Post (Black - 27.2mm x 400mm x 0mm offset) Go to amazon.com Related posts Top 5 best seatpost shimano 2022 Feature3D forged AL-7050 constructionSize: 27.2mm x 400mmOffset: 0mmInnovative 1 bolt clamping system DescriptionPRO parts are born from a collaboration between our expert product engineers and the needs of the world's leading cyclists.