16_1/2x21_5/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dupe Multi-level lockable access menu and

Multi-level lockable access menu and lockable set point to prevent accidental changes

*Large footprint with even light distribution

Can be applied as a foliar spray

This form of Nitrogen is very user friendly in that plants will only take up what they require

16_1/2x21_5/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dupe Multi-level lockable access menu andNordic 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