26x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Successful calibration indicator is displayed

Successful calibration indicator is displayed on screen

spring loaded action automatically opens blades after each cut

000W CMH lamp provides the absolute highest photosynthetically active radiation (PAR) to your specialty flowering plants

and flowers sticky like oil pesticides can

26x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems Successful calibration indicator is displayedNordic 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