23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients pH probes are sensitive glass

pH probes are sensitive glass instruments which age through normal use

Diameter 12"

Fixture Wattage: 640 Watts

Storage: Store this bag in a cool

making it suitable for both flowering and vegetative growth

23_1/4x29_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Nutrients pH probes are sensitive glassNordic 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