12x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack Monitors & Timers • Environmentally friendly

• Environmentally friendly

Ducting Size: 4” | Dimensions: 6

and elastic ankles

Drain connection: ¾" MNPT Threaded

They can be combined with other fertilizers and soil amendments according to your plants' needs

12x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 6 Pack Monitors & Timers • Environmentally friendlyNordic 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