Compatibility: A10 filters Compatible with for A10 /Master and A11 /Master Cordless Vacuum Cleaner,for S11/S12 Series Cordless Vacuum Cleaner. High quality: It is made of high-quality plastic material, with good durability and stability. Good elasticity, uniform thickness, and compliance with production standards.Recommend to replace the A10 filter every 2-4 months,According to the frequency of use, it can be replaced by a shorter or longer time. 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.Washable and Reusable.In order to the performance of the vacuum cleaner, please clean or replace the filter in time.Rinse and let air dry completely. HEPA Technology: Filter out most of the dust, pollen, smoke, odor, mold spores and pet dander. The air filter captures particles as small as 0.3 Micrometres and larger, which helps to improve health. Keep fresh air: It can filter out 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 an Perfect accessory for vacuuming and can the safety of the surrounding environment.