17_1/2x23_1/2x1 MERV 8 AC Furnace Filters 6 Pack Air Purification The standard 6 foot track

The standard 6 foot track may also be extended

CAL CHECKTM allows the user to easily check the pH probe calibration status at any time

You can use this OMRI listed

Hydrofarm's Upstart Garden Mat™ couldn't be simpler to use-just roll the mat out on your prepared patch

50% more UV than competition

17_1/2x23_1/2x1 MERV 8 AC Furnace Filters 6 Pack Air Purification The standard 6 foot trackNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters