[Fully Compatible]: The filter compatible with for A10 HERO,A11 HERO, S11, S12 cordless vacuum cleaners.Before purchasing, please carefully check the vacuum cleaner model. [High Efficiency]:The filter replacement for is made of high quality materials to durability and consistent performance to maintain excellent filtration over time. Enjoy powerful suction and improved cleaning performance. [Reusable & Washable]: Simply rinse the vacuum filter replacement with water to remove dust and dirt buildup and continued effectiveness. Let dry thoroughly before installing. It is recommended that the pre-filter be replaced every 3-4 months for efficient cleaning results. [Easy Installation]: You just need to remove the old filter and install the new A10 A11 filter in place for continuous cleaning performance. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:plastic Package Contents: 4 x Vacuum