Features 1、This bicycle saddle seat post adopts qualified carbon fiber, lightweight, solid, unbreakable and durable 2、Clamp mount is crafted with high strength aluminum, erosion proof, can be firmly mounted on bike without shaking 3、Frosted treatment of the surface, abrasion proof and scratch proof. Shockproof design, give you a better cycling experience 4、6 different options for you to choose, you can find one that fits your bike 5、Suitable for mountain bikes and road bikes, easy to install Specification Features: This bicycle saddle seat post adopts qualified carbon fiber, lightweight, solid, unbreakable and durable. Clamp mount is crafted with high strength aluminum, erosion proof, can be firmly mounted on bike without shaking. Frosted treatment of the surface, abrasion proof and scratch proof. Shockproof design, give you a better cycling experience. 6 different options for you to choose, you can find one that fits your bike. Suitable for mountain bikes and road bikes, easy to install. Specifications: Material: Carbon Fiber + Aluminum Surface Texture: 3K Color: Frosted Black Length: 350mm/13.78''; 400mm/15.7'' (optional) Diameter: 27.2mm/1.07'', 30.8mm/1.21'', 31.6mm/1.24'' (optional) Options: 27.2X350MM; 30.8X350MM; 31.6X350MM; 27.2X400MM; 30.8X400MM; 31.6X400MM Suitable for Mountain Bike & Road Bike Weight: Approx. 232-266g Packing List: 1 x Bicycle Seat Post Package List