250 Mini Blocks (AKA 150 strips)
or even any herb or harvested crop
For use in 315w CMH fixtures
Flow Restrictors limit the flow of liquid in the line
16x27x1 MERV 13 AC Furnace Filters 6 Pack Cleaning Products 250 Mini Blocks (AKA 150Nordic 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