Features: Auminum alloy material, high strength, lightweight. Quick release style clamp, convenient and useful. Can be mounted on 33.9mm/1.3inch seatpost bicycle. This bike seatpost clamp is stretch-proof and is able to lock the seatpost tightly when installed it correctly. Convenient design and simple installation. Without tools, you can adjust the height quickly and easily. Ergonomic design, lengthening rod, more efficient and more comfortable. Specification:Condition: 100% Brand NewMaterial: Aluminum AlloyColor: red, black, silver, gold (optional)Diameter: Approx. 41mm/1.6inchSuiatble for 33.9mm/1.3inch seatpost Weight: Approx. 35gPackage list:1 * Bike Seatpost Clamp