The Can Filters Original is designed for the control of VOC s (paint fumes hydrocarbons etc.) odors and other gaseous contaminants. Built with a proven Packed Bed Design and Pelletized Virgin Activated Carbon. This line of time-tested Activated Carbon Air Filters sets the standard for Long Life Consistent Performance and Low Pressure Drop. Rated at a conservative 0.1 second Contact Time Can-Filters Original provides excellent value and confidence. Specifications: Max Recirculating CFM: 120cfm. Max Exhaust CFM: 55cfm at 0.1 sec Contact Time. Flange: 4-inch(flange sold separately). Dimensions (with Pre-Filter): Outside Diameter - 5.5-inches Height - 25-inches. Total weight: 12lbs Carbon Weight: 6.6lbs.