Fangrui Product Details 1. Wide Application: The Quick-release Bicycle Seat Post Clamp Is Ergonomically Designed, And The More Comfortable And Efficient Seat Tube Clamp Is Loved By More Cyclists. The Bicycle Quick Release Seat Clip Is Suitable For Road Bicycles, Mountain Bikes, Folding Bicycles, Etc. 2. High-quality Material: The Bicycle Seat Post Clamp Is Made Of Aluminum Alloy, Which Is Light In Weight, Durable, Colorfast And Corrosion-resistant. 3. Easy Installation: The Aluminum Alloy Bicycle Seat Pipe Clamp Is Easy To Install And Use, And Can Be Installed Without Any Tools, And The Height Of The Seat Bar Can Be Easily Adjusted. The Bicycle Seat Post Clamp Is An Excellent Accessory Suitable For Any Style Of Bicycle. 4. Purchase Note: Before Purchasing The Seat Clamp, You Need To Confirm The Seat Post Label Or Seat Post Size, And Then Select The Appropriate Seat Clamp. Inner Diameter:38mm Colour:black Material:aluminum Alloy Package Contents: 1 * Seat Pipe Clamp Only The Above Package Content, Other Products Are Not Inclu