Bicycle Hollow Integrated CNC Aluminum Alloy Crankset Dust Cover, Size: 21-23mm(Black)

1. Material: aluminum alloy
2. Process: CNC, anodizing
3. Good compatibility with rubber ring, suitable for crankset with inner diameter of 21-23 mm
4. Meticulous processing, smooth and delicate surface
5. Not easy to fade, the color is bright and durable
6. Durable and not easy to rust
7. Weight: 7.3 grams