12x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack growing-media Complete and Balanced Formula: Delivers

Complete and Balanced Formula: Delivers all necessary nutrients in one concentrated solution

20 tubes per pack

5 pounds are sold individually

and horticultural applications

12x25x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 6 Pack growing-media Complete and Balanced Formula: DeliversNordic 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