The NVM1CH Numatic Hepa-Flo Vacuum Cleaner Dust Bags (Pack of 10) are high-efficiency dust bags designed to provide superior filtration and dust retention. Numatics Hepa-Flo system improves airflow, helps maintain consistent suction and extends vacuum motor life. These genuine Numatic bags are compatible with Numatic Henry, Hetty, James, Charles and George vacuum cleaners, making them ideal for domestic and professional cleaning applications.