17_1/8x34_7/8x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena 1 - 25' roll of

1 - 25' roll of 3/4" tubing

- Power coated steel

Easily attach the included tubing to a fan for even CO2 distribution throughout your grow room

The combination of these two means that it is effective against every stage of an insect's life

(Green = 390

17_1/8x34_7/8x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl-athena 1 - 25' roll ofNordic Pure Custom MERV 8 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