2 Packs 45i Replacement Filters for BreatheSmart 45i & Flex BH400 Air Purifi-er, Part # B4-Fresh & # FL40-Silver-Carbon, Includes 2 Pre-Filters

Compatible Models: Specially designed to be compatible with BreatheSmart 45i & Flex BH400 air purifi-er models. Replaces part numbers B4-Fresh and FL40-Silver-Carbon for a perfect fit and optimal performance | Powerful Filtration: The main filter absorbs most of airborne particl-es , including dus-t, poll-en, pet dand-er, and smoke | Odor & VoC absorber: Built-in activated carbon layer helps to absorb household odors such as cooking odor,pet odor and smoke | 2-Pack Value Set: Includes 2 main filters and 2 pre-filters offering extended usage and great value for homes and long-term replacement needs | Easy to Replace: No tools required. Simply take out the old filter, insert the new one and reset your machine for continued clean-air output | Suggested Replacement Cycle: For best performance, replace filters every 6-12 months depending on usage frequency.