16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack Misc This SMS lab coat protects

This SMS lab coat protects against dust

This Product Controls These Pests or Diseases: Japanese Beetles Grubs (Popillia japonica)

and people

pH test kit

Formerly Procidic 2 - Relabeled for Expanded Use For Hemp and Cannabis

16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack Misc This SMS lab coat protectsImportant 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