12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack 9 CFM Provide increased plant vigor to

Provide increased plant vigor to withstand environmental stressors

Tested: The efficacy of GrowSafe has been studied extensively

Certification - ETL

When spraying

This Product Controls These Pests or Diseases: Ants

12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack 9 CFM Provide increased plant vigor toNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in