Of course, due to the use of anode treatment and anode oxidation, our products have bright colors and good corrosion resistance. Because of the integrated production process and CNC processing, it also has good pressure. There is no doubt that our product has high wear resistance because it has high hardness. And due to high -intensity carbon fiber materials, safety can be ensured. There is no doubt that it has high stability because it can resist high -intensity impact without causing sliding. It is made of carbon fiber, aluminum alloy and ceramics, durable. The length of the product is 14.8 cm and the width is 8.7 cm thick to 4.3 cm. Your product is suitable for the power of the chain 3 and R7000 compatible R7000 after the bicycle. Slightly different from the picture. Please allow minor size differences due to different manual measurements .package includes: 1 x dial chain guide Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.