28x34x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack refurbished-products producing seedlings of the highest

producing seedlings of the highest quality

Stop using it in the last week of flowering

High red and blue spectral ratios for good photosynthesis efficiency

These awesome kits are made with Gorilla's high standards and easily snap into place horizontally on the frame of your Gorilla Grow Tent

Absolutely no switching costs

28x34x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack refurbished-products producing seedlings of the highestNordic 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