16x24x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack environmental This pH/EC/TDS/temperature probe probe features

This pH/EC/TDS/temperature probe probe features a fiber junction and gel electrolyte making it ideal for fertilizer solutions

• Ideal for vegetative growth indoors and self-watering planters outdoors

but is also compatible with almost all liquid nutrients of the bloom variety

and the rounded square shape makes these great for stacking large quantities

1 Unit Left for immediate ship

16x24x 1/2 Half Inch Ring Panel MERV 10 Furnace Air Filters 12 Pack environmental This pH/EC/TDS/temperature probe probe featuresNordic 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