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biting insects
It contains polysaccharides folded into a matrix fortified with an emulsion of trace minerals
Stack is a natural plant nutrient made from kelp extract
Silica improves the uptake of nutrients
15x19x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack DUCTWORK biting insectsNordic Pure Custom MERV 13 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
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