LifeSupplyUSA Replacement True HEPA Filter for Rabbit Air BioGS models SPA-421A & SPA-582A Compare to Rabbitair BioGS Filters for models SPA-421A & SPA-582A. True HEPA Filter - Captures particles from the air passing through the filter. Helps effectively filter airborne irritants such as smoke, pollen, dust, mold spores, pet dander and fabric fibers. Brand New Individually Sealed By LifeSupplyUSA