Optical glass, precision ground and polished, high-definition imaging Utilizes a multi-layer nano-coating process, giving the lenses superior waterproof, oil-resistant, dirt-resistant, and scratch-resistant properties Made of aviation-grade aluminum frame material, the logo is laser-etched and does not fade Anti-slip gear design with embossed patterns on the top and bottom of the frame for easy installation and removal Installation will not damage the original lenses; interchangeable filters allow you to capture every exciting moment without missing out The lenses are made using nano-coating technology; they appear differently in sunlight or artificial light Cautions: 1. Only UV filters transmit 98.5% of light, CPL/ND filters cannot be expressed in terms of light transmission 3. the lenses will appear in different colours under the angle of light, the final product will prevail in kind 4. The individual packs are packaged in a plain plastic box, not in a magnetic box 5. Installation and disassembly will touch the lenses and leave fingerprints, use a cleaning cloth to wipe the lenses Cleaning Instructions: If the lenses are contaminated with dust, water droplets or other contaminants, whether or not they have been eliminated, please remember the following instructions for use. 1. Blow off any dust on the surface of the lenses first 2. Clean them again with a clean brush 3. Wipe gently with the filter cleaning cloth delivered 4. Use a special lens cleaning solution for better results 5. Keep in the special storage box when not in use