21x23_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack meters-&-solutions When used according to directions

When used according to directions

Ergonomically designed handle rotates to fit your hand for all cutting jobs

Warranty 3-Year Limited

and 5-way PVC connectors

solvent is distilled and recovered

21x23_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack meters-&-solutions When used according to directionsNordic 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