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The silver "plus" coating attenuates the effects of large scale grows above 10
without releasing byproducts into your water supply
Total length of sheath is 13-Inches
Protection: UL Listed for Wet Locations
16_1/4x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors The silver "plus" coating attenuatesNordic 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
