1. Material: Aluminum Alloy + DuPont PA 2. Suitable for tube diameter: 32-25-22mm 3. Suitable for cell phone size: 3.5-6.5 inch 4. Mechanical screw fixing, stable and not fall off 5. Curved edge clamp design, tightly protect your cell phone 6. Compatible with a variety of models: motorcycle / electrical car / bicycle universal 7. Two mounting options: mounted on the handlebar; mounted on the rearview mirror seat 8. Weight: about 154g