14x20x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack Bio-Fertilizer This kit contains 4" flanges

This kit contains 4" flanges that will allow you to set  up air-cooling of two Powerhouse ballasts or a Daystar DAUN reflector

or as a stand alone dechlorinating and sediment filter

Eight 3" round cable sockets

Replacement part

*The 400W HPS Double Ended Grow Lamp works with any of our 400w compatible Double-ended reflectors (In stock Soon)

14x20x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack Bio-Fertilizer This kit contains 4" flangesNordic 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