18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack extension STRONG AND DURABLE – Built

STRONG AND DURABLE – Built from ultra-tough

water usage (osmoregulation)

The attached reflector increases 30% efficiency

It is also extremely effective in the soil (as a drench or flush) as it helps distribute water and nutrients deeper and more thoroughly while pushing out excess salts from the root zone

Calcium is known to play a major role in the quality of many crops

18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack extension STRONG AND DURABLE – BuiltNordic 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