16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_ps Just as important

Just as important

Add to cloning machines

Ingesting even a small amount will cause a physiological reaction in their gut and they will cease feeding and eventually die

as an insecticide and for virus control

16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_ps Just as importantNordic 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