Nordic Pure 20x20x4 (3 5/8) Pleated MERV 10 Air Filters 6 Pack

Moisture immune frame.. Made with MERV rated synthetic poly blend pleated media If you are replacing a Honeywell or Lennox 20x20x4 or an air filter with an MPR rating with an actual depth of 4 3/8, please see our 20x20x5 (4 3/8 actual depth) Hypoallergenic, antimicrobial, and electrostatic filter media. Nominal Size: 20 x 20 x 4, Actual Size: 19 1/2 x 19 1/2 x 3 5/8 (19.5 x 19.5 x 3.63) Measure your air filter for the exact size and compare it to our actual size to ensure proper fit