6x20x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Pots and Containers containing CNC machined aluminum frames

containing CNC machined aluminum frames with a modern brushed black finish

and herbs will receive adequate nutrition during the vegetative and flowering stages

With each pass through the carbon furnace air filter

This ready-to-use spray is formulated with naturally occurring enzymes and no animal products or by-products

6x20x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Pots and Containers containing CNC machined aluminum framesNordic 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