17x21x1 Exact MERV 7 AC Furnace Filters 12 Pack house and amp This multi-tool features a 7

This multi-tool features a 7

Lightproof

Suggested Uses: For use on all plants grown in soil or soilless media to kill pest and pathogens in the root zone

making clean up a breeze

KIND is ideal for Coco Coir based media

17x21x1 Exact MERV 7 AC Furnace Filters 12 Pack house and amp This multi-tool features a 7Nordic 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