Nordic Pure 16x25x4/16x25x5 (15 3/4 x 24 3/4 x 4 3/8) Honeywell FC100A1029 Replacement Pleated AC Furnace Air Filters MERV 12, Box of 1 Actual Size of Filter: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 1500-1989 Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA