Pro PLT 1-Bolt Road Bicycle Seat Post (Black - 27.2mm x 400mm x 20mm offset) Go to amazon.com Related posts Top 5 best seatpost shimano 2022 Feature3D forged AL-7050 constructionSizes: 27.2mmLength: 400mm20mm off-set flexInnovative 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.