Optical glass provides high-definition image quality and effectively reduces water droplets and water vapor. Aluminum alloy frame is durable, reliable, and sturdy. Wear-resistant and scratch-resistant for long-lasting performance. CPL polarizer helps eliminate reflections, improves image clarity, enhances contrast, and increases color saturation, making colors such as white clouds more vivid. ND filter reduces the amount of light entering the lens, allows for slower shutter speeds, prevents overexposure, reduces glare, and improves color saturation. Ideal for capturing effects like silky water, empty streets, and natural scenery. Suitable for use in street scenes, landscapes, tourist spots, and special effect photography. Note: Product appearance, color, and printed text may vary slightly between batches, but this does not affect functionality. Color: Dark Gray Material: Aluminum frame with optical glass Package Contents: 3 x Lens Filters (Only the above items included; other items not included) Note: Lighting and monitor differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.