20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack light Procidic2 is the first product

Procidic2 is the first product on the market for use on medical and hemp

Fully autoclavable

Growcubes are difficult to overwater if the container has good drainage

which adds cost and complexity

Universal BNC connector makes this the perfect replacement electrode

20x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack light Procidic2 is the first productImportant 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,