8x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Ventilation/Air Conditioning They measure a quarter of

They measure a quarter of an inch in length and are just wicked sharp

● Elite 91 ROOTS is suitable with all soil

The addition of natural sugar

the rapid breakdown of any vegetation by hungry microbes

keeping your home healthier

8x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Ventilation/Air Conditioning They measure a quarter ofNordic 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