Optical glass with high definition image quality, effectively isolate water droplets and water vapor. Aluminum alloy frame is more practical, aluminum alloy frame is reliable and firm. Wear-resistant and scratch-resistant, sturdy and more durable CPL Polarizer - CPL polarizer can eliminate harmful reflections, improve the clarity of the image, increase the contrast of light, color saturation, such as blue sky, white clouds, etc., so that the color is more vivid. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Camera Lens Filter:CPL Colour:Dark Gray Material:Light aluminum frame optical glass Package Contents: 1 * Lens Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.