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 or ND8 or ND16 or ND32 lenses of various specifications, which can meet most daily use scenarios Name:Filter Kit Applicable:for O4 Air Unit Pro Filter model:UV or ND8 or ND16 or ND32 or 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 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.