Features: The Bicycles Seatpost is make of aluminum alloy, light weight and Enduring, Not easy to rusts. The spring load Seatpost with coils spring improves Cycling comfort and damping capacity. Adjustable shock absorbers Seatpost is make to fit your weight and Cycling style to get your bike on road, beach, or mountain no delay. Suitable for most Fixed Gear bikes, Road bikes, Mountain Bike, Universal Bikes. The hydraulic system can provide sufficient pressure for a better driving experience. Specifications: Materials: Aluminum Alloy Styles: Travel 100.0mm/Travel 125mm/Travel 150mm/Travel 170mm Diameter: about 31.6mm/1.24inch Size: as shown in the picture Package Includes: 1pc Seatpost 1pc Wire Control Handle 1pc Conduits 1pc Steel Wire Cores note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.