20x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack grow-light-reflectors UVB is a reactive form

UVB is a reactive form of light naturally occurring from our sun

ARBICO Organics Rice Hulls are specially processed to contain no diseases

ANSI Cut Rated A5

Let compost or worm castings brew with EZ Tea Bloom for 12 to 24 hours then apply to plants

which has a cord length of 5

20x20x4 (3 5/8) Pleated MERV 13 Air Filters 1 Pack grow-light-reflectors UVB is a reactive formImportant 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 20x20x4 filter