Filtrete 12x24x1 Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Filters Reduced price Add Sponsored Now $27.81current price Now $27.81 $33.83Was $33.83Filtrete 12x24x1 Air Filter, MPR 1000 MERV 11, Allergen Defense, 4 Filters 5114.7 out of 5 Stars. 511 reviews Save...