Feature:1. Made of aluminum alloy, high hardness, corrosion resistance, sturdiness and durability, anodized treatment.2. 3D forging exquisite craftsmanship, pleasant touch, the head is adjustable, allowing you to sit at the ideal angle.3. The saddle cushion clamp can change the angle of the saddle cushion according to requirements to get better riding comfort.4. Suitable for most road bikes, fixed gears, mountain bikes, downhill bikes, tracked bikes, BMX, etc.5. The seatpost tube diameter is 30.9mm/1.2in, with 400mm/15.7in length, lightweight and take no burden.Specification:Item Type: SeatpostMaterial: Aluminum AlloySeatpost Tube Diameter: Approx. 30.9mm/1.2inSeatpost Length: Approx. 400mm/15.7in Package List:1 x SeatpostNote:How to choose the product correctly:1. Check the diameter of the original seatpost and choose the same size as the original diameter2. Measure the inner diameter of frame tube.Please allow error due to manual measurement. Thanks for your understanding.