17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack lighting-&-electrical-components Non-woven Blackout Poly is an

Non-woven Blackout Poly is an excellent way to get a quick start on a light deprivation setup as it can be easily adapted to any greenhouse setup and requires no retrofitting

- 4" flange pre-installed

making it the go-to choice for certified organic operations and eco-conscious growers who refuse to compromise on results

The high porosity level of TerraVesco Vermicompost allows roots to breath and retains moisture while delivering a significant amount of microbiology to the root zone of plants

and other soft bodied insects

17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack lighting-&-electrical-components Non-woven Blackout Poly is anNordic 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