21x23_1/2x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflectors and grow lights - Safety and pressure release

- Safety and pressure release valve

Use with FloraFlex® Foliar Spray

away from direct sunlight

Technaflora's exceptional liquid extract is made from 100% pure

and buffering without the logistical headaches

21x23_1/2x1 Trane Replacement MERV 13 AC Furnace Filters 6 Pack reflectors and grow lights - Safety and pressure releaseNordic 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