16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays 175w/240v Electronic Ballast

175w/240v Electronic Ballast

For peace of mind

Formulated with earth-friendly ingredients to retain moisture

Root mass was noticeably larger and plants handled stress much better than previous runs

The chelated micronutrients guarantee optimum availability over a wide pH range

16x20x 1/2 Half Inch Ring Panel MERV 13 Furnace Air Filters 12 Pack propagation trays 175w/240v Electronic BallastNordic 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