8_7/8x33_5/8x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_bfg • Multifaceted computer-designed aluminum interior

• Multifaceted computer-designed aluminum interior for maximum efficiency

and you may choose between the 100% opaque black vinyl

ideal for color coding strains

Comes with a Cool tube design for heat control

This microbially active blend was formulated to guarantee vigorous growth

8_7/8x33_5/8x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack spl_bfg • Multifaceted computer-designed aluminum interiorNordic 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