16x20x4-MERV 12 A/C Furnace Air Filters by Nordic Pure (Box of 6) Actual Size of Air Filter: 15 1/2 x 19 1/2 x 3 5/8 Superior Air Filter for Residential or Commercial Property Comparable to a MPR rating 1500-1901 Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA