Blocked filters will reduce the suction in your vacuum cleaner. Cleaning and replacing your filters regularly will help to maintain its best performance. The high grade of material, used for our filters, provides your vacuum cleaner with a high filtration level and maximum dust retention. For optimum performance of your vacuum cleaner, we recommend you replace all filters at least twice a year or when they become visibly soiled. This pack includes 2x motor filters and 4x micro filters for the following cleaners: BOLERO 1640, 1641, CHIC Z1856, Z1859, Z1860, Z1863 CLASSIC.