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42 x PotPro™ | Platform
easy adjustments
blanketing your canopy with maximum usable light
The carbon filter is no longer limited to being located inside the grow room
16x20x4 (3 5/8) Pleated Air Filters MERV 13 Plus Carbon 1 Pack spl_bfg 42 x PotPro™ | PlatformImportant 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