20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 2 Pack Hydroponics At an application rate of

At an application rate of 5 ml per gallon

This water-based gel seals the tissue around the cut stem

Protection and style are combined in this affordable pair of Grow Room Glasses

Simple and effective

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 2 Pack Hydroponics At an application rate ofImportant 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,