The Phat Filters - is a professional grade, world renowned greenhouse filter that will remove the nastiest odors from your growing area.Phat filters use a very special charcoal carbon that comes from a source of pre-Cambrian ore, or some of the oldest carbon found on earth. This carbon dates back 250 million years and is the reason our Phat Filters are so effective!

• Featuring RC 412 Charcoal
• Includes Prefilter
• Given CFM rating is for scrubbing. Divide by 2 to get exhaust filter CFM

— Ships from Seattle, Washington USA.