【Wide Compatibility】This filter cartridge is compatible with vacuum cleaners S8/S8+/S8 Pro Ultra/S7/S7 MaxV/S7 MaxV Ultra/S7 Max Ultra/S7 Pro Ultra. Please confirm your accessory model before ordering! 【Premium Material】The filter element is made of high-quality ABS material, filter paper, and EVA sponge sealing rings. The manufacturing process is uniform and compatible with all accessories, ensuring durability and high-efficiency filtration. 【Superior Performance】This filter cartridge effectively filters dust, dirt, pet hair, and more. It effectively filters over 99% of fine dust particles, and the annular edge design ensures that dust remains in the filter cartridge during cleaning. 【Washable and Reusable】It is recommended to wash and dry the filter cartridge every two weeks and replace it every 1-3 months for optimal filtration. The filter cartridge can be rinsed under running water and reused. After rinsing, it must be completely dry before using it again. 【Easy Installation】This filter cartridge fits perfectly with all accessories, and the installation method is the same as for all accessories, making installation and use very convenient. It is an ideal choice for replacing filters on a robot vacuum cleaner.