23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients Four side windows with zipper

Four side windows with zipper

Fixture Wattage: 640 Watts

Input Voltage/current- Autosensing 100-277v/0

pH probes are sensitive glass instruments which age through normal use

this is the high quality premium nutrient line that professional gardeners trust

23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients Four side windows with zipperNordic Pure Custom MERV 13 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