20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 12 Air Filters 1 Pack sprayers pre-watering of crop is strongly

pre-watering of crop is strongly suggested)

weeks before harvest of most fruiting and/or flowering crops

Bluelab's EC/CF equipment does not need calibrating as they are all factory calibrated here at Bluelab

The 10'' Saucers fit under out 1 and 2 Gallon Plastic Pots

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 12 Air Filters 1 Pack sprayers pre-watering of crop is stronglyImportant 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,