20x25x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Air Purification RPM : 0-1800 RPM

RPM : 0-1800 RPM

Double junction probe (not replaceable)

and red spectrum LED lights

and other irrigation equipment that require a high PSI to operate

Spectrum : 650-665nm

20x25x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 2 Pack Air Purification RPM : 0-1800 RPMImportant 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 20x25x4 filter