Genuine filters for Electrolux vacuum cleaners: Ergo Space ZE 2200...2299, XXL 000...XXL 300, Ultra Silencer Z 33.. Series (not suitable for Ultra Silencer Z 39 Series).Electrolux has specifically designed high quality filters to protect your vacuum cleaner’s motor from dust particles. The high grade of material provides your vacuum cleaner with strong airflow and high suction power as well as a high filtration level and maximum dust retention. For optimum performance, all filters should be replaced at least twice a year or when they become visibly soiled. Use of non original Electrolux filters may adversely affect the performance of your vacuum cleaner. This kit includes 2 motor filters. Electrolux filter reference is EF74.