20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack aaron The HI981421 GroLine Monitor for

The HI981421 GroLine Monitor for Hydroponic Nutrients provides around-the-clock

Packaging Dimensions - 20

• Use on vegetables

4 × 5 Gallon Grow Bags

The added UV increases essential oil production

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 12 Air Filters 4 Pack aaron The HI981421 GroLine Monitor forImportant 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,