Hoover (20) Type Y WindTunnel Upright Vacuum Bags, Made in USA. 20 Bags (20) 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.