Nordic Pure 16x25x5L1M12-1 Lennox X6670 Replacement MERV 12 Pleated Furnace Air Filter, Box of 1 Actual Size: 15 3/4 X 24 3/4 X 4 3/8 Superior Air Filter for Residential or Commercial Property Comparable to a MPR rating of 1500-1991 Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA