Style:Compatible,Exquisite,Simple Material type:Aluminium Batteries included?:No Features:1. Made of high quality aluminium alloy with exquisite workmanship, which is smooth, lightweight, durable and wear-resistant.2. The inner diameter of the clamp is 34.9mm, fit for 30.4/30.8/31.6mm bike seat post.3. Simple and convenient design, easy and quick to install.4. Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc.5. Available in 5 colors, you have more choices.Specifications:Item Type: Bicycle AccessoryMaterial: Aluminium AlloyColor: BlackDiameter: 34.9mm / 1.4inchFit For: 30.4/30.8/31.6mm seat post(the bicycle should be aluminum frame)Weight: Approx. 25gPackage Include:1 * Seat Post Clamp About this item [Material]: Made of high quality aluminium alloy with exquisite workmanship, the seat post clamp is smooth, lightweight, durable and wear-resistant [Compatible]: The inner diameter of the bicycle clamp is 34.9mm, and it fits for 30.4/30.8/31.6mm bike seat post [Easy Installation]: Simple and convenient design, this bicycle seatpost collar is easy and quick to install [Application]: Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc [100% Satisfaction]: If you have any question about this item, please feel free to contact us, we will help you within 24 hours on weekdays [Material]: Made of high quality aluminium alloy with exquisite workmanship, the seat post clamp is smooth, lightweight, durable and wear-resistant [Compatible]: The inner diameter of the bicycle clamp is 34.9mm, and it fits for 30.4/30.8/31.6mm bike seat post [Easy Installation]: Simple and convenient design, this bicycle seatpost collar is easy and quick to install [Application]: Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc [100% Satisfaction]: If you have any question about this item, please feel free to contact us, we will help you within 24 hours on weekdays