16x20x4 (3 5/8) Pleated MERV 8 Air Filters 1 Pack rockwool circulate air

circulate air

Grapes (all)

Root when plugs dry

More closely matches sunlight than ANY other lighting solution available

16x20x4 (3 5/8) Pleated MERV 8 Air Filters 1 Pack rockwool circulate airImportant 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