Sprocket Model: 219, 420, 428, 520, 528.
As used 7075-T6 aluminum, the hardness was able to more than HB150.
Anodized for the surface, it can increase in non-corrosibility.
The style can change accoring to customers' requirements.
This aluminum rear sprocket can be anodize into red, yellow, blue, black, gray etc. colors .
Able to change toothnumber and size as per customer's request
