16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 2 Pack pumps-&-irrigation AI21040 - GroStar GS4 pH/EC/500ppm/700ppm

AI21040 - GroStar GS4 pH/EC/500ppm/700ppm & Temp (5-in-1) Combo Pen

It is constructed of flame-retardant polypropylene thermoplastic that can be painted over to match the environment

25 inches thick

conductivity AND temperature

and the uncertainty associated with seasonal or temporary workers

16x25x5 (4 3/8) Honeywell/Lennox Replacement MERV 14 Air Filters 2 Pack pumps-&-irrigation AI21040 - GroStar GS4 pH/EC/500ppm/700ppmImportant 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,