15x18x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring Size Large | Fits Men's

Size Large | Fits Men's Size 6-11

they are most effective with 2-3 separate releases

Root Royale Coco Mats can easily be cut to size to accommodate the shape and number of rockwool slabs or cubes in your grow

The Uvonair generates Ozone (O3)—one of the most powerful oxidizers available

¾" fill/drain fitting

15x18x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring Size Large | Fits Men'sNordic 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