17_1/4x19_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents & Tarps simply add optional side walls

simply add optional side walls and shelves to make an impressive 81-inch tall

Protection agent Dry particulates Size Universal Pack Type Bulk Sterile No FITS CHEST SIZE N/A FITS WAIST SIZE N/A Color Black Material Polypropylene Seam Style Ultrasonically welded seams Closure Type Latex Free Elastic Country of Origin China

To avoid spray drift

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For indoor growers

17_1/4x19_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents & Tarps simply add optional side wallsNordic 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