16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 4 Pack Reflectors & Grow Lights Comes with protective case and

Comes with protective case and calibration solution

We call this “biological tilling

the entire microbial matrix begins to work in concert to optimize plant growth

The MS grow light can be externally controlled with digital lighting controller featuring light timing

TAKE A DEEP BREATH and BLOW IT UP

16x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 8 Pleated Plus Carbon 4 Pack Reflectors & Grow Lights Comes with protective case andImportant 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,