12_3/4x21x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dis 12'' x 40'' Charco Filters

12'' x 40'' Charco Filters Plus Activated Carbon Air Filter

PhysioSpec Indoor is a full-cycle spectrum optimized for rapid growth and complete plant development

This is a lead-free

The GMC's enclosure features four separate power outlets used to connect external devices such as fans

Use Aphidius colemani as a preventative or active control measure

12_3/4x21x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dis 12'' x 40'' Charco FiltersNordic 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