9 Filtrete 3m Hoover Type Y & Z Bags Filtrete Vacuum Bags are guaranteed to be free from defects in material and workmandship Filtrete Vacuum Bags help trap 99.97% of all airborne pollutants 0.3 microns or larger, including mold spores, pet dander, grass and ragweed pollen Filtrete Vacuum Bags treated with Ultra-Fresh Antimicrobial protect agains odor and stain causing microbial growth - keeping your bag fresher Filtrete Micro Allergen vacuum bags capture 94-percent of particles larger than 1 micron size, including dust mite debris, grass and ragweed pollen Total 9 bags