Compatibility: Our Pre Filters Compatible with for A10 Hero/Master and A11 Hero/Master Cordless Vacuum Cleaner,for S11/S12 Series Cordless Vacuum Cleaner. High material: It is made of high-quality plastic material, with good durability and stability. To your vacuum works properly and optimally, it is recommend to replace the A10 filter every 1-4 months depending on your usage. Washable: This pleated or sponge filter can be washable. Air-dry filter completely for at least 24 hours before putting it back into your hand vacuum. Easy to Install: Remove the dirt cup from the cleaner, remove the old filter. Install the new filter in place.Replace the filter regularly, make your vacuum providing best cleaning performance.Free your hands from the complicated replacement steps. No extra tools needed. Practical: This HEPA Filter Captures 99.99% of particles ejected while cleaning, including particles as small as 0.3 Micrometres, expels non-allergenic fresh air.Please clean the filter after each use to keep the vacuum working with high-efficiency. Colour: gray Material: plastic Package Contents: 5 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.