18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack ph-ec-tds-meters-and-solutions No more bruised fruit from

No more bruised fruit from shaking the crops to the ground during harvest

It's the ideal single-light solution for standard 4x4 grow tents

The auto-off feature prolongs battery life for peace-of-mind and energy savings if the meter is accidentally left on

Low-Temperature Defrost – Automatically defrosts coils in cooler conditions so performance stays consistent year-round

Made From Reinforced Polyethylene

18x18x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack ph-ec-tds-meters-and-solutions No more bruised fruit fromNordic 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