20x25x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack Hydroponics HANNA's exclusive cartridge pH and

HANNA's exclusive cartridge pH and ORP electrode

Soft start technology

Always wash your measuring cup immediately after adding and stirring in each nutrient

【High Efficiency】With the newest Samsung LED technology

replaceable trimming and grafting blades are made from SK5 high carbon steel for long lasting durability and have been chrome treated to resist corrosion and provide extra hardness

20x25x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack Hydroponics HANNA's exclusive cartridge pH andImportant 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 20x25x4 filter