16x21_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack soil RootShield Plus provides 3 months

RootShield Plus provides 3 months of preventive control for the following diseases: Phytophthora

and can be used as needed

high-quality BPA-free food-grade plastic makes it easy to see the plants and observe their growth

• PumpGuard is safe for use with plastic

16x21_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack soil RootShield Plus provides 3 monthsNordic 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