The Farfi Bicycle Quick Release Seatpost Seat Tube Clamp is made of high hardness aluminum alloy material, ensuring strong wear resistance. It features an anodized surface treatment and includes a quick release lock design. The hollow design makes it lightweight and easy to carry. This seatpost clamp comes in three specifications. The 28.6mm seat tube clamp fits 25.4mm seat tubes, commonly used for road bikes or fixed gear bikes. The 31.8mm seatpost clamp fits 27.2mm and 28.6mm seat tubes. The 34.9mm seat tube clamp fits seat tubes such as 30.4mm, 30.8mm, 30.9mm, and 31.6mm. With its quick-release locking mechanism, this seatpost clamp is durable and lightweight. It adds style to your bike and allows easy adjustment of the seat post height. The Farfi Bicycle Quick Release Seatpost Seat Tube Clamp is a practical choice for cyclists. Package Includes: 1 x Seatpost Clamp Key Features: - Made of high hardness aluminum alloy material - Anodized surface treatment - Quick release lock design - Hollow design for lightweight and portability - Compatible with various seat tube sizes - Durable and lightweight construction - Adds a stylish look to your bike - Easy to adjust seat post height