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The cover body is made of die-cast aluminum alloy with a durable powder-coated finish, ensuring excellent resistance to corrosion, weathering, and wear. The cover and outer ring are CNC-machined from solid aluminum alloy and surface-anodized for enhanced strength and a premium appearance. The transparent window is made from a special high-performance plastic material, offering excellent mechanical strength, outstanding clarity, and long-lasting reliability. Precision machining, premium materials, and high-quality finishes combine to deliver the perfect balance of design, durability, and performance.