11_1/2x11_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses INERT INGREDIENTS: Glycerin 4

INERT INGREDIENTS: Glycerin 4

100% made in the USA

manganese sulfate and Zinc sulfate

Some of these crops include berries and small fruits

11_1/2x11_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses INERT INGREDIENTS: Glycerin 4Nordic Pure Custom MERV 10 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