20x24x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack Nutrients and Supplements Continue on a regular schedule

Continue on a regular schedule throughout the growing season

This Kit includes (2) Sunmaster 315W CMH Full Nova Lamps (SKU SM80440)

Hanna's line of calibration solutions have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet

- 1 Nighttime Device (outlet powers on only at night)

20x24x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack Nutrients and Supplements Continue on a regular scheduleNordic 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