Hoover Type Y WindTunnel Upright Vacuum Bags, Made in USA. 12 Packages of 3 Bags (36 Total Bags) Made In The USA. Captures 99.97% of Airborne Microscopic Particles as Small as 1 Micron. Ideal For Homes With Breathing Issues or Allergies Designed to fit all Hoover WindTunnel, T-Series, TaskVac Upright Bagged Models Fits Hoover Part Numbers; 4010100Y, 902481001, AH10040, AH10165, 902419001.