18x22x1 MERV 13 AC Furnace Filters 6 Pack Reflective & Greenhouse Films 17 x QDPS Multi Flow

17 x QDPS Multi Flow | 1" T

(2) Bulk Head Screens

This kit contains 4" flanges that will allow you to set  up air-cooling of two Powerhouse ballasts or a Daystar DAUN reflector

The results come from the key role potassium plays in the development of flowering plants

4000K color temperature—great for seedling and vegetative growth

18x22x1 MERV 13 AC Furnace Filters 6 Pack Reflective & Greenhouse Films 17 x QDPS Multi FlowNordic 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