20x25x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Lighting Accessories quick to fill

quick to fill

making it extremely strong and durable

Current flowing in between the electrodes causes the water to boil

Elite 91 CalMag is suitable with all soil

Producing very high levels of PPF output of 816 µmol/s and a Photon Efficacy (fixture efficiency) of 2

20x25x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack Lighting Accessories quick to fillImportant 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