The materials of the license plate bracket are usually as follows:

1. Stainless steel: Stainless steel is a commonly used material for automobile license plate bracket, which has the advantages of corrosion resistance, high temperature resistance and wear resistance, and can maintain luster and appearance for a long time, and is suitable for use in various harsh environments.

2. Aluminum alloy: Aluminum alloy is a lightweight, high-strength material with good corrosion resistance and oxidation resistance, which is suitable for making automobile license plate brackets and can provide stable support and protection.

3. Plastic: Plastic is a light and durable material, which is often used to make economical automobile license plate brackets. It has good waterproof and dustproof performance and is suitable for general daily use.

4. Carbon fiber: Carbon fiber is a kind of high-strength, light-weight material with excellent wear resistance and impact resistance, which is suitable for making high-grade automobile license plate brackets, providing better protection and aesthetic effect.

5. Iron: The iron license plate bracket is usually galvanized or sprayed, which has high strength and durability and is suitable for general daily use.

Different materials of license plate bracket have their own characteristics and applicable scenarios, and consumers can choose suitable materials and styles according to their personal needs and budgets.