16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays The chelated micronutrients guarantee optimum

The chelated micronutrients guarantee optimum availability over a wide pH range

Works across a wide range of growing media including soil

grasshoppers

Silverleaf whitefly (Bemisia spp

16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays The chelated micronutrients guarantee optimumNordic 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