16_1/2x21_5/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Mother Earth Perlite is naturally

Mother Earth Perlite is naturally occurring siliceous rock that expands up to 20 times its original volume when heated to 1600° F

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and can be ordered as individual bottles or by the case

As they eat they will lay eggs which will hatch into ladybug larvae

16_1/2x21_5/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Mother Earth Perlite is naturallyNordic Pure Custom MERV 12 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