24 1/2x27x1 Trane ReplacementMERV 7 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal the trademarked phosphorus booster used

the trademarked phosphorus booster used in Oneness makes photosynthesis in your plants function optimally

All Nordic Pure Air Bear replacement pleated air filters are manufactured using a heavy duty

sine wave design

With the Grow Flow's easy-to-program controller unit

rust-proof metal connectors (depending on size)

24 1/2x27x1 Trane ReplacementMERV 7 Plus Carbon AC Furnace Filters 6 Pack X Nutrients Grow Spray 1 Gal the trademarked phosphorus booster usedNordic Pure 24 1 2x27x1 Trane Replacement 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: