18x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting Efficacy 93 lm / W

Efficacy 93 lm / W

It’s long lasting

and links to tutorial videos to make the growing experience safe and simple

These jumbo plugs give you 32 "homes" for your seedlings and cuttings

18x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting Efficacy 93 lm / WNordic 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