1. [HEPA Filter for Vacuum Cleaners] This vacuum cleaner filter is suitable for Compact C1, Compact C2, Complete C2, Complete C3, as well as the S4000 to S4999, S5000 to S5999, S6000 to S6999, and S8000 to S8999 series. It can replace -HA 50 / -AH 50, - 50, -AA 50, -SA 50 / SA - 50. 2. [High - efficiency Filter] The HEPA H13 particulate filter is used to separate impurities from the air discharged by the vacuum cleaner. It can filter out more than 99.95% of all fine dust particles with a diameter of up to 1 micron (i.e., 0.001 mm). The multi - layer filtration system can effectively purify the discharged air. 3. [High Quality] This vacuum cleaner component meets or exceeds the standards of quality, compatibility, and durability and has been rigorously tested. It is made of high - strength materials and is environmentally friendly and non - harmful. 4. [Maintenance] Despite having fine dust protection and odor isolation functions, your vacuum cleaner can still maintain 100% suction power. For optimal performance, it is recommended to replace the vacuum cleaner filter every 6 months, especially in households with children, pets, or smokers. - Warm reminder: For optimal performance, it is recommended to replace your vacuum cleaner filter every 6 months, especially in households with children, pets, or smokers. - Color: Blue - Material: Plastic - Dimensions: 200x100x28 mm - Package contents: - 3 vacuum filters - Only the above package contents are included, and other items are not included. - Note: Light and different displays may cause the color of the item in the picture to vary slightly from the actual product. A measurement error of +/- 1 - 3 cm is allowed.