20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 13 Plus Carbon 4 Pack ph-ec-tds-meters-and-solutions The Large Gym Bag features

The Large Gym Bag features the large main zippered compartment which has 2 layers of zippered openings for maximum odor-trapping capabilities

Probe separation 50 mm/2''

Max: 300V / 221° F

200K natural white spectrum is good for all stages of growing

seaweed and humic acids

20x25x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 13 Plus Carbon 4 Pack ph-ec-tds-meters-and-solutions The Large Gym Bag featuresImportant 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,