15x18x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring Root Royale Coco Mats can

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

Clean to reduce the plugging up of flower stems which reduces water uptake

Note: This case does not include overwrap or HIC (Humidity Indicator Cards)

The ballast is low frequency ballast designed specifically to run low frequency CMH arc tubes

15x18x1 Exact MERV 13 AC Furnace Filters 6 Pack Liquid & Weight Measuring Root Royale Coco Mats canNordic 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