Air Bear 20x25x5 (4 7/8) Replacement 259112-102 MERV 12 Air Filters 4 Pack aaron The EC/TDS portion is a

The EC/TDS portion is a two-ring probe that comes with the HI9814

The TableTop System comes all-inclusive with the largest hopper in the industry

• 50 pH-balanced plugs

Ergonomically designed handle

Air Bear 20x25x5 (4 7/8) Replacement 259112-102 MERV 12 Air Filters 4 Pack aaron The EC/TDS portion is aImportant 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 3 8 and 5 1 4 inch depth filters,