11 3/8x11 3/8x1 Exact MERV 8 AC Furnace Filters 6 Pack complete grow kit calibrate tester as either cup

calibrate tester as either cup style or dip style (depending on intended method of use)

2 - Coreopsis

Increase porosity in growing media allowing more air flow and drainage

this blade is composed of D2 hardened steel making it durable and a guaranteed quality cut

11 3/8x11 3/8x1 Exact MERV 8 AC Furnace Filters 6 Pack complete grow kit calibrate tester as either cupNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters