<p>High-hardness scratch- glass material: The lens is made of high-aluminum glass with higher hardness, which is not afraid of being scratched by sand and dust in the airflow during flight; The high-quality white material base has better light transmittance, ensuring that the picture is color-free during high-speed dive metal frame: The frame is made of CNC metal material, which is strong and light, not easy to deform; it can effectively resist impact and prevent the filter from loosening and affecting or falling and losing ND filter: Reduce the amount of light entering, prevent overexposure of the picture, and keep the dynamic blur natural during high-speed flight UV filter: Transparent and colorless, physically protect the lens from being scratched by branches\/gravel, and present the picture quality without loss Multiple specifications: The set includes UV\/ND8\/ND16\/ND32 lenses of specifications, which can meet most daily use scenarios Name:Filter Kit Applicable:for O4 Air Unit Pro Filter model: UV\/ND8\/ND16\/ND32 Filter The product appearance and printed words depending on the batch, but this does not affect use Colour:As Shown Material:CNC aluminum parts + high aluminum white glass Package Contents: 1 x Filter Kit 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.</p>