16x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack spl_hgc micRO-75 Add-on DI Filter Cartridge

micRO-75 Add-on DI Filter Cartridge Kit

With regular use

phosphorus and potassium into a true solution

Slugs and snails are attracted to SLUGGO

The built-in flow restrictor is intentional — it ensures adequate contact time between the water and the filtration media for maximum chlorine and chloramine reduction

16x20x4 (3 5/8) Pleated MERV 14 Air Filters 2 Pack spl_hgc micRO-75 Add-on DI Filter CartridgeImportant 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 16x20x4 filter