22x22x1 MERV 7 AC Furnace Filters 6 Pack special-order Sturdy: Heavy duty design supports

Sturdy: Heavy duty design supports a total weight up to 330 lbs (including the weight of the unit itself and optional lighting systems)

Technaflora's pH Up and pH Down enable the gardener to moderate and maintain optimum pH levels

- Works as part of the FloraFlex® PotPro™ 16/17mm tubing drainage system

25% stronger than our standard vac seal bags

it has a large amount of available calcium

22x22x1 MERV 7 AC Furnace Filters 6 Pack special-order Sturdy: Heavy duty design supportsNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters