18x18x2 Pleated MERV 13 Air Filters 3 Pack cloning-and-seed-starting Duct Opening: 8” | Length:

Duct Opening: 8” | Length: 20" | Airflow Rating: 770 CFM | Carbon: Australian RC412 at 1200+ IAV | Thickness: 38mm

Hanna Instruments Direct Soil HALO pH Electrode gives you the ability to measure

14” deep

unlike any other machine in the industry

18x18x2 Pleated MERV 13 Air Filters 3 Pack cloning-and-seed-starting Duct Opening: 8” | Length:Nordic Pure MERV 13 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200