7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Tents 4" x 8" Standard Carbon

4" x 8" Standard Carbon Air Filter

and the greatest steering capabilities available

gnats and fleas

Directions For Use

This solution is formulated for use with all types of growing media and is made from pure biological sources to help protect against a wide range of plant diseases

7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Tents 4" x 8" Standard CarbonNordic 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