20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 10 Air Filters 1 Pack spl_hf It has a built-in 1%

It has a built-in 1% RH deadband and is ETL-listed

When used as a soil drench

Many university studies have proven the superiority of products created by this mycologist

8 ft RO and drain line

It is suitable for protecting agains most disinfectants and organic pesticides such as Pyrethroids in low concentrations

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 10 Air Filters 1 Pack spl_hf It has a built-in 1%Important 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,