17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Water Pumps & Irrigation Supplies Stakes on the bottom add

Stakes on the bottom add extra stability

Note: Active Aqua Infinity Trays contain recycled plastic

Integrated sensor for better application flexibility

For use with the Hydrologic water filtration systems in indoor garden hydroponics

Features stator-blade fans which can deliver strong airflow from high static-pressure ductwork

17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Water Pumps & Irrigation Supplies Stakes on the bottom addNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition