21 1/2x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal The GMC's remote combination probe

The GMC's remote combination probe features a highly accurate dual beam CO2 sensor

folded collar

and beneficial insects when used as directed

It can be used with the lights on or off without any adverse effects

21 1/2x24x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal The GMC's remote combination probeNordic Pure pleated AC air filters are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home or office. Each time air passes through a Nordic Pure pleated furnace filter, lint, household dust, pollen, dust mites, pet dander, baking flour, mold spores and other contaminants are removed. Our filter media prevents the growth of bacteria or mold, resulting in a much healthier living space.