Sturdy Material: Bicycle Seatpost Clamp is made of high quality aluminum alloy material, good quality, and wear resistant. Fine Workmanship: Folding Bike Seatpost Clamp is small size doesn't take up space and looks beautiful, exquisite workmanship, nice touch feeling, smooth surface without burrs, lightweight and labor saving. Size: Bicycle quick release seatpost clamp size is 7cmx8cmx4cm/2.76inchx3.15inchx1.57inch. Easy Installation: The aluminum alloy bike seat tube clamp is easy to install and use, no tools are required for installation, and adjusting the height of the seatpost is easy. Widely Used: The bike seatpost clamp is a great accessory for mountain bike, folding bike, road bike, etc. Specification: Material: Aluminum Alloy Size Chart: 7cmx8cmx4cm/2.76inchx3.15inchx1.57inch Package Includes: 1 Bike Seatpost Clamp Note: Please allow slightly errors due to manual measurement and different monitors.