16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack LED Lighting 12 x Micro Drip |

12 x Micro Drip | 2-Way Parallel Split Micro Tube Dripper Assembly 30" x (Single Unit)

Escherichia coli O157:H7

Alarm Box and/or Sample Pot

Minimal residue issues

– Aggressive Dosage Rate: 3 ML per gallon

16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 2 Pack LED Lighting 12 x Micro Drip |Important 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