16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays grasshoppers

grasshoppers

Root mass was noticeably larger and plants handled stress much better than previous runs

Ideal for use with trimmers

175w/240v Electronic Ballast

16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays grasshoppersNordic 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