personally think that the K&F Concept Nano-X 77mm variable grey filter is quite well done. It is delivered in a nice cardboard box, a filter bag made of synthetic leather with a magnetic closure. The ultimate is the orange ribbon on the side of the bag. If you pull on it, the filter is pulled cleanly out of the bag and can be easily removed. Someone has put some thought into that. I would like to say the following about the filter function. I cannot share the opinion of many of the stories circulating on the Internet. On a YouTube channel, for example, one person explained that the filter forms an X on the last steps and that there are therefore no 1-9 steps. That is not correct. In my photo above you can see that there are a total of 10 white dots on the filter. There would therefore always be a step between 2 dots. If you move in this field of dots as described in the K&F instructions, then the X caused by the two filter discs is "NEVER" visible. I have been using the filter for some time now. It works perfectly and costs only a fraction of the price of competing products. This filter also has a high-quality nano coating. If you hold it under the tap, you can literally watch the water run off. Yes, I would buy a K&F Concept product again. Yes, I no longer believe the negative comments from many of the competing testers here on the internet! This filter is absolutely top-notch, with good accessories, well thought out, and of good quality, at an absolutely reasonable price. So I give it 5 stars!