1. Optical glass, precision grinding and polishing, high-definition imaging, double-sided multi-layer nano-coating process, restore the 2. Installation will not damage the lens, replace the filter at any time, so that you do not miss the wonderful moments. 3. for your lens protection; 4. small and , logo engraved by laser engraving will not fade, 5. Adjustable filters, by rotating the gear can adjust the light, choose the right luminosity for , Specification:ND16 Colour:Black Material:Optical Glass Package Contents: 1 x Drone 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.