20x25x5 Honeywell Replacement MERV 11 furnace Air Filter Qty 4 Nominal Size:20x25x5 Actual Size:19 7/8x24 7/8x4 3/8 Electrostatic air filter captures dust, pollen, dust-mite debris, mold spores, pet dander and smog Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA