Nispira True HEPA Filter Compatible with Flex 45i Air Purifier B4-Odor B4-Fresh FL40-Silver-Carbon Item Package Quantity:3 9% of air pollutant particles

9% of air pollutant particles as small as 0

which effectively removes impurities

Replace air filter if it becomes discolored or wet

Durable replacement filter construction

Nispira premium HEPA filter replacement compatible with Air model SPA-421A & SPA-582A

Nispira True HEPA Filter Compatible with Flex 45i Air Purifier B4-Odor B4-Fresh FL40-Silver-Carbon Item Package Quantity:3 9% of air pollutant particlesNispira HEPA + activated charcoal filter replacement compatible with model 45i Flex Air Purifier Preliminary Filter traps hair and dust. High quality HEPA filter capture 99. 97% of airborne particles down to 0. 3 microns. Activated carbon filter deodorize any unfavorable household odor and traps the dust Easy to install. Suggest replacing the filter every 6 month the most to maximize the performance 14. 25"L x 11"W X 2"TH 100% customer satisfaction