Fellowes AeraMax Carbon Filter for 290/300/DX95 Air Purifiers (4-Pack) 9324201 - The Home Depot
Amazon.com: TerraBloom 8" x 24" Carbon Filter for Grow Tent - 46mm Charcoal Carbon Air Filter - Maximize Airflow with 750 CFM - Premium Carbon Air Filter & Charcoal Filter for Homes
iPower 4 inch air carbon filter odor control scrubber with australia virgin charcoal for inline fan, reversible flange, prefilter included - Walmart.com
24x36x1 Astro-Sorb Activated Carbon AC / Furnace Filter | Air Filters, Inc.