ZOOM 30.9mm Bicycle Mountain Bike Telescopic Seat Rod Seatpost Extended Saddle Tube One-Key Lifting Shock Seat Tube p20241126822 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 Stroke: 100mm Application: mountain bike or road bike and other bicycles size:30.9 x 375mm colour:Blackandyellow Material:Aluminum alloy Package Contents: 1 x Bicycle adjustable seat tube Only 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 1-3cm.