1. Weight: 30.5g 2. Specification: 41mm 3. Material: aluminum alloy 4. Application: suitable for most folding bikes with a seat tube diameter of 33.9 mm (suitable for aluminum frame, not suitable for steel frame) 5. Features: fine processing, fine-tuning screw design, so that the seat post clamp will not damage the seat post itself while locking the seat post, so that the frame and the seat post are closer together and the force is more direct
