20x25x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack led • Dolomitic and Calcitic limestone

• Dolomitic and Calcitic limestone (pH adjuster)

Adjustable V-Link Belt for the CenturionPro Mini

The sealed motor and removable

Advanced Dimmable Feature with use of External B-Lite Master Zone Controller (0W - 315W)

They consistently provide intense light in the correct spectral range for vigorous flowering growth and can even be used

20x25x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack led • Dolomitic and Calcitic limestoneImportant 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