16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack Liquid & Weight Measuring favored by thousands of horticulturists—but

favored by thousands of horticulturists—but with the added feature of curved blade tips

Attached thumb loops help keep sleeves in place to avoid skin exposure

Save money on your electric bill with this 27-watt bulb

The ARS-1 mini-split air conditioner controller is a unique product that solves the age-old problem of having separate day and night temperature settings on your mini-split air conditioners

Maximum Residue Limits (MRL) and FIFRA 25(b) exempt

16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 6 Pack Liquid & Weight Measuring favored by thousands of horticulturists—butImportant 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