Nominal Size: 20 x 25 x 5 AB, Actual Size: 19 3/4 x 24 1/4 x 4 7/8 (19.75 x 24.25 x 4.88) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit. Trion Air Bear Replacement filters have a depth of 4 7/8" and ideal for customers with health problems or for commercial units Nordic Pure MERV 14 is equivalent to MPR 2800 Made in the USA