General description The 4pcs Cartridge Filter is designed for compatibility with Rowenta X-FORCE FLEX vacuum cleaners, specifically models RH9877WO, RH9878WO, RH9879WO, RH9890WO, RH9958WO, RH9959WO, and RH9990WO. This replacement filter effectively blocks 99.97% of pollen, dirt, dust, pet hair, and other particles as small as 0.3 microns, ensuring a cleaner home environment. Technical specifications Compatible part number: ZR009007 Package contains: 4 filters Filtration efficiency: 99.97% for particles as small as 0.3 microns Compatibility and accessories Compatible with Rowenta X-FORCE FLEX 11.60 models: RH9877WO, RH9878WO, RH9879WO, RH9890WO Compatible with Rowenta X-FORCE FLEX 14.60 models: RH9958WO, RH9959WO, RH9990WO Installation Easy to install Usage Regular cleaning and replacement of the filters is recommended to maintain optimal performance and extend the vacuum cleaner's lifespan For best suction performance, replace the filter every three months Washable and reusable for