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. Compatibility: A10 filters Compatible with for A10 Hero/Master and A11 Hero/Master Cordless Vacuum Cleaner,for S11/S12 Series Cordless Vacuum Cleaner. 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. 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 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. 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. Material:plastic colour:Photo Color Package Contents: 2 * Pre-filter 1 * rear filter 1 * Cleaning brush Only the above package content, other products are not included. Note: Light 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.