20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 4 Pack Grow Light Reflectors produces minimal heat and is

produces minimal heat and is silent

Blade Thickness: 1

Sachets will be active for about 4-6 weeks depending on infestation level and predator establishment

these durable poly covers also resist shifting temperatures

Less stress means more optimal plant function

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 4 Pack Grow Light Reflectors produces minimal heat and isImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,