1Made of aluminum alloy material, high strength, sturdiness and corrosion resistance, with 31.6mm/1.2in diameter. 2The surface is treated with anodic sandblasting process, the overall hardness and feel are improved, not easy to accumulate dust. 3The stamp is clear and not easy to fade, you can use a 6mm hex wrench to adjust the softness and hardness, and the riding is comfortable. 4The seatpost adopts a doublenail rearfloating design, and the two screws are not easy to break when locked. 5The builtin spring coil and shock absorbers rubber absorb the vibration during riding, making your riding more comfortable. 6The resilience can be adjusted by tightening or loosening the bottom screws, and the suspension stroke is 40mm/1.6in. Item Type: Bike Suspension Seatpost Material: Aluminum AlloyColor: Black Diameter: Approx. 31.6mm/1.2in Seatpost Length: Approx. 335mm/13.2in(Without screw fixing kit) Weight: Approx. 595.0g/21.0oz Application: Mountain Bike/Agent Bike/Road Bike 1 xBike Suspension Seatpost 1 x Manual Please pay attention to choose the correct diameter size, the wrong size will not work, take out the current seatpost and marks the diameter in its lower area.