Features: 1. Improved oxidation hardness / CNC oxidation / anodic oxidation 2. New dental profile, chamfered extended positive and negative teeth 3. Surface knives, improved color aesthetics, tooth-shaped high bite force, no chain loss Product information Material: aluminum alloy Application: Shimaro M7100 / M8100 / M9100 Process: Improving hardness hardness / CNC oxidation / anodic oxidation / T6 Selling point: surface knives, aesthetics of color upgraded, tooth-shaped high bite force, no chain loss Package include: 1 x chainring Note: Please allow 0-1cm error due to manual measurement. Pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Diamond angle tooth profile, extended chamfer cast wide teeth, CNC turning, anodized, upgraded T6 hardness. High strength aluminum alloy material, greatly improved the hardness performance.strong texture,beautiful color.. The alternative design of narrow wide teeth makes the chain softer and more stable, and the chain is not easy to fall off.. T6 heat treatment, CNC processing, lighter weight and higher strength. . Classic original silver main body. Weight reduction, drainage and mud design.