High Quality Material: It is made of high quality material, with good durability and stability. Good elasticity, uniform thickness and strict adherence to production standards. It is recommended to replace the A10 filter every 2-4 months depending on usage. Compatibility: Our pre-filters are compatible with Tineco A10 Hero/Master and A11 Hero/Master cordless vacuum cleaners, for PURE ONE S11/S12 Series cordless vacuum cleaners. HEPA Pre-Filters: Filter out most dust, pollen, smoke, odors, mold spores and pet dander. The air filter captures particles as small as 0.3 microns and larger, helping to improve health. Easy to install: remove the dust cup from the cleaner, remove the old filter. Install the new filter in place. Replace the filter regularly, make your vacuum cleaner have the best cleaning performance. Free your hands from complicated replacement steps. No additional tools needed. Keep the air fresh: It can filter harmful odors in the air, which is very suitable for people who want to keep the air fresh and control the air quality. It is a perfect accessory for vacuuming and can ensure the safety of the surrounding environment. Color: Gray Material: Plastic Package Content: 3 x Filter 1 x Cleaning Brush Only the above package, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The allowable measurement error is +/- 1-3 cm.