Air Bear 20x25x5 (4 7/8) Replacement 255649-102 MERV 10 Air Filters 4 Pack hawthorne professional grade commercial base nutrient

professional grade commercial base nutrient formulated for the bloom/flowering phase

This mushroom grow kit blend of sterilized grain and substrate contains everything growers need to grow mushrooms

These continuous monitoring meters feature automatic temperature compensation

1 Base (200gr) & 1 Bloom (200gr)

Air Bear 20x25x5 (4 7/8) Replacement 255649-102 MERV 10 Air Filters 4 Pack hawthorne professional grade commercial base nutrientImportant 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 3 8 and 5 1 4 inch depth filters,