Nordic Pure 16x25x5, MERV 10, Lennox Replacement Air Filter, Box of 1 Actual Size: 15-3/4 x 24-3/4 x 4-3/8 Replacement filter for Lennox X6670 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