16x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack nutrients-and-supplements PhysioSpec Indoor: 2

PhysioSpec Indoor: 2

and Cepaea spp

MaxMicrobe is a mixture of over 25 microbial strains that have a demonstrated ability to multiply and coexist together in close proximity

Heavy RED Spectrum

and grubs when they are in the soil

16x20x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack nutrients-and-supplements PhysioSpec Indoor: 2Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter