High quality materials: high quality aluminum alloy, light weight, high strength, durable. Anodized, rustproof, smooth and wear-resistant surface. High carbon steel screws have high compressive strength and do not break or deform. They lock the seat post and inner tube securely to make your ride safer Easy to use: the seat clamp with quick release lever has a greater clamping force, which is very suitable for quick and easy adjustment. Even if you are not good at repairing a bike, you can just clip it to the bike, which is very convenient and practical Features: HIGH QUALITY MATERIALS: Made of aluminum alloy with excellent finish, smooth, light, durable and wear-resistant. Adjustable size: 28.6mm diameter pipe clamp, only suitable for 25.4 outer diameter seat rods Ergonomic design: With the quick release, you can easily adjust the height of the saddle to your body size. Easy installation: even if you are not good at repairing a bike, you can easily install it on the bike, which is very convenient and practical. Specifications: Material: aluminum alloy Color: red, black, silver, blue and orange Use: Adjust the height and fix the position of the bicycle saddle The package includes: 2 x clamped bicycle sea