Ultralight Carbon Fiber Seatpost Tube Clamp: Weighing only 6 g, this clamp is crafted from quality carbon fiber for durability and practicality. Ring and Titanium Screws: Includes a boltcompatible ring and ultralight titanium screws for secure, versatile functionality and reliable performance. Two Size Options: Available in 8 mm and 34.9 mm, the clamp accommodates a variety of seatpost sizes for flexibility and compatibility. Sleek Black Glossy: Features a sleek black glossy finish that adds a professional look to your bicycle while maintaining a lightweight design. Use scenarios: Road and gravel bikes where reducing weight without compromising seatpost security is a priority. Carbon fiber frame builds or upgrades where lightweight, durable hardware and titanium screws enhance performance and corrosion resistance. Shops, bike enthusiasts, or riders who switch between bikes or seatposts, benefiting from the two size options to handle different post diameters.