Compatibility: Compatible with part number ZR009007. Filters for Rowenta X-FORCE FLEX 11.60 (RH98xx models): RH9877WO, RH9878WO, RH9879WO, RH9890WO. Filters for Rowenta X-FORCE FLEX 14.60 (RH99xx models): RH9958WO, RH9959WO, RH9990WO. The replacement filter helps keep your home clean by blocking 99.97% of pollen, dirt, dust, pet hair and other particles as small as 0.3 microns. The package contains 4 filters. Regular cleaning and replacement of the filters helps maintain perfect performance and extend the life of the vacuum cleaner. To obtain the best suction performance, it is recommended to replace the filter every three months. The filter for ZR009007 is made of high quality and environmentally friendly materials, easy to install. Washable and reusable for longer life and better filtration, it makes your vacuum cleaner cleaner and longer.