Yes, this is the right filter...! Also visible under is accessories from....

This is the right one. Cheaper in the Mi-Store + 5-year warranty on almost all products.

Fortunately, all Xiaomi Air Purifiers use the same filters, the best filter in 2020 is the grey one, the second best is the violet one, followed by the green one and the blue one brings up the rear. The blue one is of course also great, it is just standard, i.e. most air purifiers are supplied with a blue one. Model 3H comes with the best grey one, which costs 69.90 individually. But you can upgrade all Xiaomi Air Purifiers with a grey one or with the purple or green one.