1. Compatible Models This replacement filter is suitable for various models of Rowenta ZR903701 Silent Powerful Cyclone Vacuum Cleaners, such as RO7611EA, RO7623EA, RO7634EA, RO7647EA, RO7663EA, RO7676EA, and RO7681EA. 2. Value Pack It includes 2 exhaust filters and 2 pre - motor filters. It is recommended to replace and clean the filters after 2 - 3 months of use. Regular replacement or cleaning of the filters can help extend the service life of the vacuum cleaner. 3. Washable and Reusable The pre - motor filter can be washed, and the high - efficiency filter can be cleaned. If the filter is found dirty, it can be taken out for cleaning to keep it clean and improve the filtering effect. (Ensure the filter is completely dry before use, which takes at least 24 hours.) 4. Good Filtering Performance Rowenta's filters are made of filtering materials that can effectively filter and block dust. This helps us breathe cleaner and fresher air, adsorb odors, and protect our family from airborne particles. 5. Easy to Install No complex installation steps are needed. You can install our accessories easily without using any tools. 6. To keep your vacuum cleaner running efficiently, it is advisable to replace the accessories every 2 - 4 months.