Genuine Hygiene Filter™ washable cartridge filter for Electrolux bagless vacuum cleaners: TWINCLEAN Z 8200...8290. Electrolux has specifically designed high quality filters to protect your vacuum cleaner’s motor from dust particles. The high grade of material, used for our genuine filters, provides your vacuum cleaner with strong airflow and high suction power as well as a high filtration level and maximum dust retention. To ensure the performance of your cleaner, we recommend you wash this Self Clean™ filter when the time in-between filter clean indication becomes short, i. e. approximately 12 months for normal usage. For optimum performance all filters should be replaced when they become visibly soiled. Use of non original Electrolux filters may adversely affect the performance of your vacuum cleaner. Contains 2 original washable cartridge filter, Electrolux Twinclean filters reference is EF 78.