16x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack Cone Filler The actual spade head measures

The actual spade head measures 14

Twister T2 Hopper Twist Knob

- 2530 RPM

throughout the full cycle (in both vegetative and flowering phases)

16x20x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 12 Pack Cone Filler The actual spade head measuresNordic 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