These are 10 high quality aftermarket Numatic and NACE HEPA Type Allergen Vacuum Cleaner Bags for all Numatic and Nace Care 300 Series Canister Vacuum Cleaners, including the (Blue) Charles and the (Green) George Wet / Dry Models, and N.A.C.E Commercial Models; NVQS and other 300 Series models. These upgraded cloth synthetic allergen bags offer 99.97% filtration efficiency, and capture Microscopic Airborne Allergens that normal paper bags release. These bags are ideal for environments that have dust problems, or NEED a dust free environment. Also very efficient for vacuuming up drywall debris, and other fine particles that will cause standard paper bags to burst. Fits Numatic HEPA-Flo Bag Part Number NVM-2BH, or Part Number 604016 10 Bags per package.