Feature:1. Using highquality aluminum alloy material, it has high hardness, corrosion resistance, sturdiness and durability.2. Anodized treatment and exquisite craftsmanship for comfortable hand feeling.3. With 3D forging process, the angle of the seat cushion can be flexibly changed according to your own requirements, making riding more comfortable.4. The seat tube has a heightadjusting ruler with clear scale lines, making it easier to install.5. Suitable for most road bikes, fixed gear bicycle, mountain bikes, downhill bikes, tracked bikes, etc.Specification:Item Type: Bicycle SeatpostMaterial: Aluminum Alloy Length: Approx. 400mm / 15.7inPipe Diameter: Approx. 30.9mm / 1.2inProduct Weight: Approx. 392g / 13.8oz.Package List:1 xBicycle Seatpost Note:How to choose the product correctly:1. Check the diameter of the original seat post and select the same size as the original diameter.2. Measure the inner diameter of the frame tube.3. Each seat tube has a lower limit to ensure that the part under the safety line is completely inserted into the seat tube of the frame.4. Please allow 12cm error due to manual measurement. Thanks for your understanding.