Description
Calcium to build structure
For use with indoor/outdoor plants
Its sleek metal design makes this box easy to mount and durable during all of your grow room endeavors
Application Considerations:
3 microns— similar to the protection of an N95 respirator
16x20x5 (4 3/8) Honeywell/Lennox Replacement Air Filters MERV 12 Pleated Plus Carbon 1 Pack Tents & Tarps Calcium to build structureImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,