Nordic Pure 10x24x1M12-12 MERV12 AC Furnace Air Filter, Box of 12 Actual size of air filter: 9 1/2 x 23 1/2 x 3/4 Superior Air Filter for Residential or Commercial Property Comparable to a MPR rating of 1500-1930 Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA