The ND filter set for the DJI Mini 3 Classic was well packaged and delivered quickly. All filters are delivered directly in a practical plastic box. The scope of delivery includes 4 ND filters with integrated polarizing filters. With the ND filters you can record much nicer videos, especially on cloudless days. These are like a pair of sunglasses for the camera, the higher the value, the darker the image. When filming in 4K 30fps, the shutter speed should be 1/60 to make the footage look cinematic. However, this is impossible on sunny days, even if the ISO is 100. So it needs an ND filter to darken the image. If you want to record with 60fps, you should set the exposure time to 1/120. This requires an ND filter with a small value. So far I have only used the ND4 to ND16 filter. The other filters are only suitable for special applications or for long exposures. The latter is difficult to achieve with a drone.
I am also satisfied with the processing quality of the filters. They are made of aluminum and glass and are very light. The filters do not affect the functionality of the gimbal system. The protective hood still fits on the gimbal system. The filters can also be attached and removed without any problems. They also sit very firmly on the camera. Finally, you get inexpensive ND filters that help you to expose the video with the ideal exposure time.