17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films Micron sizes:

Micron sizes:

Let the organic growing experience begin with Biobizz Try-Packs

Boot covers are designed with tunnelized elastic to offer a more secure closure

In grow tents

and sturdy stalks and branches to support bigger

17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack reflective-and-greenhouse-films Micron sizes:Nordic 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