Features:Aluminium alloy material, stiff and sturdy, strong and durable, and can be used for a long time.Convenient design and simple installation, easy to install on the bicycle with a locking threaded nut.Can be mounted to 31.6mm and 30.8mm seatpost of mountain bike and other bicycles.Good finish and lightweight, taking no space and looks beautiful.According to the needs of your bike, there are two colors to choose from.Specification:Condition: Brand NewMaterial: 6061 Aluminium AlloyInner Diameter: Approx. 34.9 mm / 1.37 inApplication: for 30.8mm and 31.6mm Seat PipeWeight: Approx. 11 - 12 gPackage List:1 * Seat Post ClampNote: The Seat Post Clamp ONLY, bike and other objects in picture are only for photography, they are NOT included in our listing.