16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 1 Pack food-&-water-storage Strikes both metal halide and

Strikes both metal halide and high pressure sodium bulbs

Bubble Magic Rosin Bags are offered in 2 sizes and 5 different microns

Made in the USA: Of US and Imported Parts

and hormones

Calibration automatic

16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 1 Pack food-&-water-storage Strikes both metal halide 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 16x20x4 filter