20x26x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses and the trouble free center

and the trouble free center bolt eliminates adjustment problems

clean and easy to use

This ballast is built to last with a patented design that allows electrical contact to happen only when a seal is achieved

Made especially to work with Rock Wool

20x26x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack tents-/-indoor-greenhouses and the trouble free centerNordic 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