Nordic Pure 17x20x1CustomM8-6 MERV 8 AC Furnace Filters, 6 Piece Actual Size: 16 1/2 x 19 1/2 x 3/4 (16.5x19.5x0.75) Measure your current filter and compare the exact Dimensions with the ACTUAL size listed above before you order MERV 8 media is ideal for normal air filtration and will help those with mild allergies Hypoallergenic and antimicrobial pleated electrostatic filter material Made in the USA