20x25x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack fluorescent-lighting High quality quartz glass for

High quality quartz glass for consistent spectral output and PAR production

You should soon see improved yields and reduced nitrates among your fruit trees and faster rooting and more brilliantly colored foliage and blooms for your ornamentals

Nitrided Blades are FoodSafe

It has a metal front grill with impact resistant plastic rear grill and chemical resistant polypropylene blade

As an added bonus

20x25x4 (3 5/8) Pleated MERV 12 Air Filters 1 Pack fluorescent-lighting High quality quartz glass forImportant 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