The ferrule material can be aluminum, copper
Aluminum ferrule: surface can be anodized to a variety of colors such as silver, black, red, blue, green, etc;
Copper ferrule usually can be plated into limited colors,and the cost is high.
Aluminum ferrule VS copper ferrule:
The cost of copper ferrule is 4-5 times of aluminum ferrule. The hardness is 10 times of aluminum ferrule
Copper ferrule is thicker/brighter/durable than aluminum ferrule.
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