25.4/27.2/28.6mm Bicycle Seatpost MTB Mountain Road Bike Seat Post Tube Aluminum
4.9 levels ultra high strength, maxium of 580lbs ; Adjust tube length of 0 to 300mm. With adjustable head, Easy to install. Adjust tube length: 0-300mm. Constructed of ultra light and strong 6061 T6 aluminum alloy.