16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack hawthorne These tiny holes and crevices

These tiny holes and crevices inside each pebble hold and transmit extremely high amounts of air and water to your plant's roots

PPF: 858 umol/s

120/240V dual receptacles

bryoniae) and many others of economic importance

Offers an economical means of seed propagation

16x20x4 (3 5/8) Pleated Air Filters MERV 7 Plus Carbon 1 Pack hawthorne These tiny holes and crevicesImportant 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