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25-inch long machine screws with nuts to mount a 80 mm fan with the included 120mm fan guard onto the ventilation grille
Designed for consistent results in commercial growing facilities
Utilizing an innovative EC motor that is controlled electronically using PWM (Pulse Width Modulation)
It targets Blue Orchard Mason Bees (Osmia lignaria) that are known as excellent pollinators
12x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack cloning-&-seed-starting 25-inch long machine screws withNordic 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
