20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 12 Air Filters 4 Pack Commercial Lighting Size: 30MM diameter

Size:  30MM diameter

Countless others have tried to create a product that replicates its features and quality

This simple maintenance helps guarantee adequate head pressure to promote the flow of reference electrolyte into the sample being measured

and safety guidelines

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 12 Air Filters 4 Pack Commercial Lighting Size: 30MM diameterImportant 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,