Features130.9/31.6mm bicycle seatpost, internal routing design, giving you a nice riding experience. 2High-strength aluminum alloy seatpost with fine workmanship and high hardness to ensure nice durability. 3Liftable design, the height adjustment range is 100mm, which is convenient for you to adjust to a suitable riding position. 4It is compatible with most mountain bikes, road bikes, downhill bikes, MTB, BMX, etc. 5Note: Please confirm the diameter and size of the bicycle seatpost before purchasing.SpecificationFeatures:30.9/31.6mm bicycle seatpost, internal routing design, giving you a nice riding experience.High-strength aluminum alloy seatpost with fine workmanship and high hardness to ensure nice durability.Liftable design, the height adjustment range is 100mm, which is convenient for you to adjust to a suitable riding position.It is compatible with most mountain bikes, road bikes, downhill bikes, MTB, BMX, etc.Note: Please confirm the diameter and size of the bicycle seatpost before purchasing.Specifications:Color: BlackMaterial: Aluminum AlloyPost Diameter: 30.9mm / 31.6mm(optional)Item Weight: 662g/ 23.4ozPackage Size: 410 * 160 * 70mm/ 16.1 * 6.3 * 2.8inPackage Weight: 915g/ 32.3ozPacking List:1 * Seat PostPackage List1 * Seat Post