Filtrete FAPF034 Air Cleaning Filter, 11 3/4" x 21 1/2" (exact dimensions 11.75 x 21.5 x 1)
Brand: 3M
Better than HEPA at capturing airborne particles
Filter captures 99.9% of large airborne particles and allergens like pollen, mold and dust mite debris
Ultra Quiet model FAPO3 uses replacement filter FAPFO3
Manufactured by 3M