Applicable Vacuum Cleaner Model: This replacement filter is perfect for A10 Hero, A10 Master, A10 Dash, A11 Hero, A11 Master, Pure One S11 Series, S12, and X cordless vacuum cleaners. Please confirm your vacuum cleaner model before placing an order to avoid making an incorrect purchase. Made of Premium Materials: This A10 filter is made of high-strength and durable materials, it is not easily damaged, and has a strong capacity. filtration, which can maximize the vacuum cleaner's cleaning ability. The best choice for keeping the house clean and improving the air quality of the house. Washable and Reusable: This replacement filter for A11 can be cleaned with water and can be reused after completely drying. It is recommended to clean this Pure One S11 filter every 2 to 3 weeks and replace it every 2 to 3 months to maintain effective filtration of the vacuum filter replacement. Package Contents: 4 Pack HEPA Pre-Filters for Cordless Vacuum Cleaners A10 A11 Hero, A10/A11 Master, A10 Dash,