Color: Black, Silver, Red, Blue, Gold (Optional) Material: 6061 Aluminum Alloy Process: CNC, Surface Sandblasting Tube Thickness: 2.8mm Features: High-strength aluminum alloy material, CNC integrated molding, surface sandblasting, fine texture and fine workmanship. Features: 1. It is made of aluminum alloy with high hardness and corrosion resistance. 2. The seat tube has a heightadjusting ruler, and the installation is more clear. 3. Each seat tube has a lower installation limit to ensure that the part under the installation safety line is completely inserted into frame seat tube to ensure safe riding. 4. The inclination of the seat cushion can be adjusted steplessly, which is convenient and safe. 5. Works for most of mountain bike, shrink head style suitable for clip code saddle, dual rail style suitable for bow saddle. Package Included: 1 x Bicycle Seatpost Note: 1. Please allow 1-2cm measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slight different from the color shown on the pictures.