Features: 1. Made of high quality aluminum alloy with excellent workmanship, which is smooth, lightweight, durable and wear-resistant. 2. The inner diameter of the clamp is 34.9mm, fits the bicycle seat post 30.4/30.8/31.6mm. 3. Simple and convenient design, easy and quick installation. 4. Suitable for most types of aluminum frame bikes, such as mountain bike, road bike, etc. 5. Available in 5 colors, you have more choice. . ALLOY BICYCLE SADDLE CLAMPS BLACK Technical data: Item Type: Bicycle Accessories Material: Aluminum Alloy Optional Color: Black, Red, Blue, Gold, Titanium Diameter: 34,9 mm / 1,4 inch Fits: seat post 30.4/30.8/31.6mm (bike should be aluminum frame) Weight: approx. 25g . ALLOY BICYCLE SADDLE CLAMPS BLACK The package includes: 1 x dropper post clamp suitable only for aluminum alloy frame, carbon fiber material cannot be used. . ALLOY BICYCLE SADDLE CLAMPS BLACK