Construction: The Bicycle Seat Tube Clamp is designed with high-quality materials, ensuring long-lasting performance for both Mountain Bike and Road Bike enthusiasts. Easy Installation: This Seat Tube Clamp provides quick and hassle-free installation, making it an essential accessory for all your bicycle riding needs. Versatile Compatibility: Perfectly suited for bicycles, this Bicycle Riding Accessory fits seamlessly onto different tube sizes, guaranteeing a secure fit for your bike. Secure Locking Mechanism: The Seat Lock feature ensures that your seat stays securely in place during rides, providing you with confidence and stability while cycling. Design: The design of the Bicycle Seat Tube Clamp does not add unnecessary weight to your bike, enhancing your overall riding experience on any terrain. Colour:black Material:Aluminum alloy + iron size:31.8mm Package Contents: 1 * Seat tube clamp Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.