Nominal Size: 16 x 25 x 5 H, Actual Size: 15 3/4 x 24 3/4 x 4 3/8 (15.75 x 24.75 x 4.38) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit. Replaces Honeywell 16x25x4 and filters with an MPR rating with an actual depth of 4 3/8 and ideal for helping keep equipment working efficiently and reducing odors Nordic Pure MERV 8 is equivalent to MPR 800 Made in the USA