1. Main material: aluminum alloy (frame) + optical glass 2. Double-sided multi-layer nano-coating process to restore true colors 3. ACG optical glass, precision grinding process, MCUV filter with high light transmittance, high-definition imaging 4. Made of aviation aluminum frame, the logo is engraved by laser without fading, and the black matte frame prevents ghosting caused by light leakage 5. Waterproof, oil-proof, scratch-resistant, protect your lens 6. The lens protection cover can be installed without removing the filter, which can protect the filter from damage during storage 7. Magnetic absorption storage box, the box is equipped with a soft sponge, the fixed filter is not easy to fall, allowing you to travel far 8. The surface is made of nano-coating technology, the lens will show different colors under the angle of light, and the actual object shall prevail 9. Net weight: 0.7g (single), 2.2g (set of 4), 3.2g (set of 6) 10. Size: 2.2x1.9x0.1 cm Precautions: 1. Only the UV filter can transmit 98.5% of the light, and the CPLND filter cannot be expressed by light transmittance 2. The single product is a plastic storage box and the set is a magnetic storage box, (single filter non-magnetic packaging box) Please pay attention before purchasing 3. The lens will show different colors under the angle of light, and the actual object shall prevail 4. Installation and disassembly will touch the lens and leave fingerprints. Use a cleaning cloth to wipe the lens