17_1/4x19_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Also features a multi-position tilt

Also features a multi-position tilt

and patented phosphorus-utilization technology

The wishbone spring opens automatically after each cut for quick multiple cuts

5 and 6-inch thick filters could last up to 6 months

When blended with the Azadiractin

17_1/4x19_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Also features a multi-position tiltNordic Pure Custom MERV 12 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