Hygienic Double Micro Filtration Paper Dust Bag is excellent vacuum cleaner accessory. It is compatible with VB390T Plain Packed Numatic 200/Henry 1B/C. It is ideal for a hygienic clean. Double micro filtered bag. Retains dust, dirt, dust mites, bacteria etc. Designed to keep airflow at its best, you won't lose suction in the middle of cleaning. Ensures all dust is securely trapped in bag. Equivalent to bag type NVM1B and NVM1C. The pack contains 10 paper dust bags.