The Xiaomi Air Puifier all use the same filters, there are different color ones, this model has the Gray 3H HEPA filter, but the purple one would also work or the green or blue one. These filters are interchangeable and please do not throw a perfectly working filter away just because the Mi App is telling you that it needs to be replaced after approx 180 days. These filter interchange values are for Asian markets where there is so much air pollution that you should replace it quite often. In Switzerland, you can clean the filter outside with a vacuum cleaner and you can re-insert, reset the filter and re-use it for a year or even more.
Fun fact, you can buy these filters at Galaxus but not with Digitec, although you can also buy the Mi Air Purifier with Galaxus too.
https://www.galaxus.ch/search
