20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack LED or it can be connected

or it can be connected to a Netafim PCJ "hub dripper" for CNL pressure compensation

36" x 500'

compatible with all Hydrofarm or Xtrasun ballasts

8 pre-mounted brass burners

mineral buildup

20x25x4 (3 5/8) Pleated Air Filters MERV 15 Plus Carbon 6 Pack LED or it can be connectedImportant 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