Arm & Hammer Odor Eliminating Vacuum Filters, Eureka HF-9 ™ with HEPA: * For use in Eureka 4100, SC4180, 4300-4600, SC4500, 5180 and 5190 series models * Designed according to strict HEPA standards * Baking soda particles neutralize odor-bearing chemicals * Releases clean, odor free air into your home as you vacuum * Replace filter every 90-120 days for optimal performance * Filters are not washable