20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack cococube SPO TDS Calibration Solution 1L

SPO TDS Calibration Solution 1L

SG Ballast

The timers can be set-up to be recycling timers

Built-in overflow system delivers excess water and nutrients straight to the rootball

Deliver water and nutrients straight to the root zone

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 2 Pack cococube SPO TDS Calibration Solution 1LImportant 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,