1. design of the lifting tube can make the pole suitable for the seat rod to turn large and small.2. The meticulous color design can make people feel a unique feeling.3. Convenient installation, suitable for most seat tubes.4. The seal ring design can effectively protect the inner tube clean, fit the inner tube more closely, and protect the oil inside from leaking out.Product Name: Lifting Seat Post: ZOOMStroke: 100mmApplication: mountain bikeroad bike and other bicyclessize:30.9 x 375mmcolour:Black+yellowMaterial:Aluminum alloyPackage Contents:1 x Bicycle adjustable seat tubeOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is + 13cm.