The materials used for rearview mirror assemblies include:

 Plastic: Plastic rearview mirror assemblies are the most common material used in the market. They are lightweight, cost-effective, and have good impact resistance, making them widely used in the automotive industry. The surface of plastic rearview mirror assemblies is typically coated with paint to improve weather resistance and corrosion resistance.

Glass: Glass rearview mirror assemblies offer high transparency and stability, providing clear rear visibility for drivers. However, glass rearview mirror assemblies are heavier, increasing the vehicle's weight, and glass is prone to breakage, reducing safety.

Electronic display screen: With technological advancements, some modern high-end vehicle models may use electronic display screens as rearview mirrors. These assemblies provide higher clarity and more information display, such as camera views around the vehicle. However, they are more costly and less common.

Carbon fiber: Carbon fiber rearview mirror assemblies have found applications in the automotive industry. Carbon fiber materials have high strength, lightweight properties, and corrosion resistance, enhancing vehicle handling and safety. However, they are more expensive and primarily used in high-end models.

Alloy: Alloy rearview mirror assemblies offer high strength, toughness, impact resistance, and wear resistance. They also have good corrosion resistance and weatherability, suitable for various harsh environments.

In summary, rearview mirror assemblies can be made from materials such as plastic, electronic display screens, carbon fiber, and alloy. Different materials have varying characteristics and applications, and automobile manufacturers choose the appropriate material based on the vehicle's positioning and market demand. When purchasing rearview mirror assemblies, consider factors such as material, quality, durability, and practical functions like heating and power adjustment.