Fitment: Road bike seat post fits for F8 F10 F12 bicycles, 340mm long. Material: Made of T700 high modulus carbon fiber, monocoque construction, light weight, no rust, no bending, comes with screws and nuts. Function: Designed to provide superior stiffness and yet absorb road shock to give you a performance advantage. Easy Installation: Very simple to install, just unscrew the old seat, remove the seat post, and then bolt the seat to your new seat tube, finally install it to your bike. Replacement: A good and direct replacement for old or broken seat post. Type: Bicycle Seat Post Applcable Models: F8 F10 F12 Colour:black Material:carbon fiber type:A: 0 degree Package Contents: 1 x Road Bike Seat Post Seat Tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.