17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack LED thereby making conventional fertilizer utilization

thereby making conventional fertilizer utilization much more efficient

montmorillonite

The slim blades are made of strong Japanese steel and designed to stay sharp an extra long time

coco fiber (coir)

17x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack LED thereby making conventional fertilizer utilizationNordic Pure Custom MERV 13 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