16x20x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack Master Controller 100% soluble and does not

100% soluble and does not need agitation in the tank

5V signal into digital RS-485 signal

Ensure that you always pass state testing requirements with a healthy-clean crop by applying weekly foliar applications of Defender PM

The electrostatically charged media attracts and captures large allergens like mold spores

one side black (Black/Clear)

16x20x4 (3 5/8) Pure Carbon Pleated Odor Reduction Merv 8 Furnace Filters 2 Pack Master Controller 100% soluble and does notImportant 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