20x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack spl_bfg Pressing either the probe icon

Pressing either the probe icon in the Hanna Lab App or button on the HALO pH probe will tag sample data for easy reference

• Long Lasting: Superior product stability means longer shelf life

2 speed settings

and comes with

20x20x4 (3 5/8) Pleated MERV 14 Air Filters 1 Pack spl_bfg Pressing either the probe iconImportant 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. If you are replacing a 4 3 8 depth 20x20x4 filter