【Adjustable Seatpost】This Adjustable Seatpost Seat Post equipped with built in spring coil absorbing the vibration during riding to provide a comfortable cycling experience 【Dimensions】27.2mmx350mm. Shock absorb travel 40mm/1.73in, seatpost total length 350mm/13.7in. Make sure you checked what diameter you need before buying. 【High Quality】Bicycle seatpost shock absorber is made of qualified aluminum alloy, durable, stable, antirust, high strength, and solid, and can be used long time. 【Easy to Use】Thickened pipe wall. Frosted surface, exquisite workmanship, nice touch feeling. The bottom screw can adjust the spring re bound force. 【Wide Applications】Our bicycle suspension seatpost is perfect for most mountain bikes, road bikes, folding bikes, fixed gear bicycles, track bikes, BMX, etc. Specification: Material: Aluminum Alloy Size: 27.2mmx350mm/1.07inchx13.78inch Package Includes: 1 Bicycle Seatpost Note: Please allow slightly errors due to manual measurement and different monitors.