1. Easy to install, not easy to rust 2. CNC precision machining, high hardness, wear-resistant and durable 3. Smooth speed change, one-piece molding 4. Using high-strength aluminum alloy to reduce weight, improve strength and rigidity, strong force, not easy to break 5. All the arc transitions between the positive and negative teeth are connected to avoid sediment accumulation 6. Vacuum plating, anti-oxidation, vacuum plating forms a special protective film to prevent surface oxidation 7. Weight: 802g
