20x25x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack CO2 A powerful gardening tool

A powerful gardening tool

The fans are very tough and will easily handle even the harshest grow room environments

Thielaviopsis basicola

Botrytis and Pythium at bay

and 3 Feet DC Extension Cord

20x25x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack CO2 A powerful gardening toolNordic 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