6x30x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers Mycotrol WPO contains the highest

Mycotrol WPO contains the highest spore concentration in a Beauveria bassiana-containing insecticide

Constructed with 1680D thread density fabric that is up to 9x denser than other grow tents on the market

Large - Case of 12 sleeves (12 units per sleeve)

UV resistant

6x30x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack environmental-controllers Mycotrol WPO contains the highestNordic Pure Custom MERV 7 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