1. Material: Aluminum alloy 2. 31.8mm diameter seat tube clamp: suitable for 27.2/28.6mm seat posts 3. 34.9mm diameter seat tube clamp: suitable for 30.4/30.8/30.9/31.6mm seat posts 4. Application: suitable for fixing seat posts of mountain and folding bicycles, disassembly and assembly with a 4mm hexagonal wrench 5. The surface is round and smooth, without burrs, and will not damage your bicycle 6. Lightweight aluminum alloy is used as the material, the middle wall thickness is made thinner, and two reinforcing ribs are retained to improve strength
