Ultra-clear optical glass multi-layer film reduces light pollution, clear imaging, and movie-like 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: filters ultraviolet rays, reduces the blur and color deviation of the distant view, and can also be used as a protective filter for the lens Multiple specifications: The set includes UV/ND8/ND16/ND32 lenses of various specifications, which can meet most daily use scenarios Name:Filter Kit Applicable:for O4 Air Unit Pro Filter model:UV/ND8/ND16/ND32/64 Filter The product appearance and printed words depending on the batch, but this does not affect use. Colour:As Shown Material:CNC aluminum optical glass Package Contents: 1 * 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.