Aluminum

Suspension seatpost. Build-in PU spring.Help to alleviate the shocks from all the bumpy roads.Help to make your bike very comfortable to ride.It can be adjusted to soft or hard.Made of 6mm High quality aluminium alloy.Light weight,never rust.Saddle clamp angle can adjust in -5 degree to +18 degree. 2 bolts hold the clamp, enhance safe and easy to install.Suitable for most Mountain bikes, Road bike, Downhill bike, Track bike, MTB, BMX, DH, etc Specifications: Material:6061 T6 Aluminum alloy Color:black Weight:about 270~300g Length:350mm Seat post thickness:6mm,high strength. Seat post diameter:27.2mm/30.9mm/31.6mm Features: Build-in PU spring.Help to alleviate the shocks from all the bumpy roads. Can be adjusted to soft or hard. Light weight,never rust. Made of 6mm High quality 7075 aluminium alloy. Easy to stall. Package includes: 1 X Suspension Bike Seatpost (with stall srews) Pay attention: Please confirm the seat post size you need before you buy it.