18x30x1 Pleated MERV 7 Air Filters Number Per Box:6 With the 4" and 5"

With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer

Nordic Pure 16x24x4 Pleated Air Filters MERV 7 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

Nordic Pure 16x25x4 Pleated Air Filters MERV 13 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

Nordic Pure 16x28x6 Aprilaire Space-Gard 2400 Replacement Air Filters Part 401 MERV 12 Plus Carbon are made of a dual material where the MERV rated material has been fused together with a carbon layer

18x30x1 Pleated MERV 7 Air Filters Number Per Box:6 With the 4" and 5"Actual Size: 17 3 4 x 29 3 4 x 3 4 (17. 75 x 29. 75 x 0. 75) Merv 7 pleated air filter captures large airborne particles like household dust, mold spores, and pollen. This dust reduction air filter is ideal in keeping your AC and furnace equipment working efficiently Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 7 is equivalent to MPR 600 Made in the USA. Nordic Pure MERV 7 Pleated AC Furnace