What it can provide you is the excellent shock resistance, which it has good use feeling. And it has delicate appearance and good stability because its high hardness and smooth line design.The reason why it has long service life is the excellent workmanship because it has good rust resistance and oxidate resistance, which it is sturdy and compact.It is made from carbon fiber, is durable to use.There is one size of the product to choose from.Applicable to road bikes, mountain bikes, folding bikes, etc.Item Name: Bike Seat TubeMaterial: Carbon FiberFeatures: Anti-rust, Smooth Surface, Perfectly Fitment Color: Black Specification: 350mm, 400mmBack Drift: 20mmSize Details: Length: 35cm/13.78"(Approx.)Length: 40cm/15.75"(Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Bike Seat Tube Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.