The Numatic 604011 NVM-1AH Hepa-flo High Efficiency Filter Bags are a box of 10 OEM vacuum cleaner bags designed for high efficiency filtration. With a capacity of 1.5 L and a power source of air, these universal compatible bags are suitable for a variety of vacuum cleaners. The set includes 10 bags, making it convenient for regular cleaning needs. The Numatic brand ensures quality and compatibility with a wide range of models, making these filter bags a reliable and efficient choice for maintaining clean and healthy air in your home.