The genuine non washable Hygiene Filter™ is specially designed to fit most ELECTROLUX vacuum cleaners: Accelerator, Air Max/GREEN, Bolido, Clario, Classic Silence, Cyclone Power, Cyclone XL, Ergobox, Ergo Space/GREEN, Essensio, Excellio, Jet Maxx/GREEN, Maximus, Oxygen+, Oxygen, Smartvac & Powersystem, Super Cyclone, Twin Clean, Ultra Active/GREEN, Ultra One/GREEN, Ultra Silencer/GREEN, Ultra Performer, Viva Control, Viva Quickstop. ELECTROLUX has specifically designed this high quality filter to maintain the filtration and suction performance of your vacuum cleaner and to offer you a healthier place. A Hygiene Filter™ captures even the finest particles of pollen, mould spores, dust mite faeces and allergens. For optimum performance of your vacuum cleaner, all filters should be replaced at least twice a year or when they become visibly soiled. The use of non genuine filters may adversely affect the performance of your vacuum cleaner. A washable Hygiene Filter™ is also available, look for reference EFH12W. This pack contains one non washable Hygiene Filter™.Filter reference: EFH12.