Product Detail Product Dimensions: Inches 13x 9.5 x 8.5. Filter Efficiency is 99.97% of 0.1 micron particles on Speed One. Filters of polypropylene with more activated carbon for better smoke and gas removal. Carbon filter with a honeycomb-type structure that improves airflow. Progressive Filters have 3 layers composed of millions of ultra thin fibers with a carbon element . The "Blueair 500/600 Series Smokestop Filter" is best product for you. We recommended Blueair 500/600 Series Smokestop Filter