12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack stocked This controller is UL-listed for

This controller is UL-listed for safety—and currently the only heat mat controller on the market with a UL listing

Soluble Seaweed Extract can also be stirred with water to create a liquid for use as a foliar spray

• 3” x 34” material column

Use KALIX Nitrogen to optimize nitrogen levels during all phases of plant growth

12x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack stocked This controller is UL-listed forNordic 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