17x17x1 Exact MERV 7 AC Furnace Filters 12 Pack Nutrients and Supplements In- duces flowering and stimulates

In- duces flowering and stimulates resinous oil and fragrance production in many flowers and medicinal herbs

Food grade

Most weeds begin wilting within 30–60 minutes of application

Designed for use with plants

17x17x1 Exact MERV 7 AC Furnace Filters 12 Pack Nutrients and Supplements In- duces flowering and stimulatesNordic Pure MERV 7 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters