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 polished, smooth surface without burrs, extended arm design, lightweight and labor saving.Size: Seat post clamp diameter is 38mm, anodized color, bright color, not easy to oxidize and not fading.Easy Installation: The aluminum alloy bike seatpost clamp is easy to install and use, no tools are required for installation, adjusting the height of the seatpost is easy.Nonslip: Accurate buckle design, antislip hollow design, easy to twist without slipping. Bike Seatpost clamp is a great accessory for any style of bike. Specification: Material: Aluminum Alloy Size Chart: Diameter: 38mmThickness: 8mm Package Includes: 1 Mountain Bike Seatpost Clamp(6 Pack) Note: 1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful online shopping! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.