17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pump * Industrial strength zippers

* Industrial strength zippers

The active ingredients of Soybean Oil (39%) and Sodium Lauryl Sulfate (19%) along with citric acid and isopropyl alcohol combine to make a potent treatment for russet mites

Powerful concentrate

The Grow1 3 Gallon Pump Sprayer is made from the highest grade polyethylene plastic that resists corrosion from insecticides or herbicides

Grow-Cubes are easy to use and reasonably priced

17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack pump * Industrial strength zippersNordic Pure Custom MERV 12 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition