Feature:1. High Strength Aluminum Alloy: The seat tube clamp is made of aluminum alloy, which is wear resistant and of high strength.2. Smooth Without Burrs: CNC cutting, grinding and polishing for smooth surface without burrs and good hand feeling.3. Lightweight Seatpost Collar: The seatpost clamp adopts a large area hollow design, which is light and does not increase the burden on the bicycle while stabilizing the seat tube.4. Anode Coloring: The seatpost collar adopts anode coloring treatment, the color is bright, not easy to oxidize and fade.5. Widely Used: The 31.8mm seat tube clip is suitable for most 27.228.6mm / 1.071.13in seat posts, and widely used for mountain bikes, road bikes, and all other models.Specification:Item Type: Bike Seatpost Clamp Material: Aluminium AlloyProduct Diameter: Approx. 31.8mm / 1.3inProduct Weight: Approx. 20g / 0.7ozApplication: Suitable for most 27.2-28.6mm / 1.07-1.13in seat posts.Package List:1 x Bike Seat Post Clamp