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: Condition: 100% New Item Type: Bicycle Accessory Material: Aluminium Alloy Optional Color: Black, Red, Blue, Gold, Titanium Diameter: 34.9mm / 1.4inch Fit For: 30.4/30.8/31.6mm seat post(the bicycle should be aluminum frame) Weight: Approx. 25g Package Include: 1 x Seat Post Clamp .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Note:Only suitable for aluminum alloy frame, carbon fiber material cannot be used. 1Made of high quality aluminium alloy with exquisite workmanship, which is smooth, lightweight, durable and wear-resistant 2The inner diameter of the clamp is 34.9mm, fit for 30.4/30.8/31.6mm bike seat post 3Simple and convenient design, easy and quick to install 4Suitable for most types of aluminum frame bikes, like mountain bike, road bike, etc 5Available in 5 colors, you have more choices