Amazon.com - HQRP Cartridge HEPA Filter compatible with Hoover 40130050, 43615090 Type 50 for all Fold Away & Turbo Power 3100 series WidePath Upright Vacuum Cleaners -
THINK CRUCIAL Replacement HEPA Style Filter Fits Hoover Windtunnel Bagless, Washable and Reusable, Part 40140201 and 43611042 40140201 - The Home Depot
Repl. Hoover Air Model Primary Filter, Washable, Part 303903001 | Think Crucial
HOOVER ONEPWR 20 VOLTS LITHIUM POWERED HAND HELD VACUUM CORDLESS WASHABLE FILTER - Standard Distributors Limited