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

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. Two beneficial air filters in one - rated synthetic poly blend activated carbon infused pleated media If you are replacing a Honeywell or Lennox 20x20x4 Plus Carbon or an air filter with an rating with an actual depth of 4 3/8, please see our 20x20x5 (4 3/8 actual depth) Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame.