20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Environmental Controllers Stack is a natural plant

Stack is a natural plant nutrient made from kelp extract

• Improves nutrient and water uptake

durable humidity control

Luxx NX-1 Controller

One room for your flowering plants and the other for propagation and vegetation plants

20x25x4 (3 5/8) Furnace Air Filters MERV 12 Pleated Plus Carbon 1 Pack Environmental Controllers Stack is a natural plantImportant 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 20x25x4 filter