Made of quality high-quality aluminum alloy material, CNC processing, anti-rust and durable to use Frosted texture, not only beautiful texture but also plays a role in increasing friction According to your own requirements, change the angle of the seat cushion to get better riding comfort Build-in spring coil, effectively absorb the vibration while riding, the seat post comfort your riding experience, improves the shocks A great replacement seatpost for most bikes, mountain bikes, road bikes, etc (with matched diameter) Note: Please install the seat tube beyond the safety line. Specification: Material: Aluminum alloy 6061-T6 Size: 31.6*400mm Features: Double nailed rear floating hollow design, adjustable softness and hardness of the absorber, 3D forging+CNC turning Package included: 1 x Bicycle Seat Post Other things not included