Fit models: a10 filters are compatible with for a10/a11 hero, a10/a11 master, s11, s11 series, pwrhero 11 snap, hero+, master+, a10/a11 essential, a10 dash, a10-03, a11-07, s12 pro ex,s15 series cordless stick vacuum cleaner Premium 4+4 design: Package includes 4 pack pre hepa filters, 4 pack white post filters replacement for a11 . When you need to clean and dry, you can choose a spare filter Washable and reusable: The filter replacement for can washable and reusable, simply rinse with clean water and let it completely air dry before reusing them Premium efficiency filtration: S11 filter replacement for made of high-strength material has higher suction performance Easy to install: Just remove the old filter and install the a10-03 filter replacement for in place. It is recommended that replace the pre filter every 3-4 months, hepa filter every 6 months for continuous cleaning performance Vacuum Part Type: Filters Colour:As Shown Material:plastic Package Contents: 8 x filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.