Manufactured with only the finest high porosity activated carbon, the PROfilter 70s effectively remove 99.5% of volatile organic compounds. The factory-installed high capacity PREfilter eliminates bigger particles such as dust to prevent premature usage of the carbon. Rated for a continuous worry-free operation, lightweight, and compact dimensions make the PROfilter 70s ideal for residential filtration. Design features: High capacity prefilter: 20mm thickness Low air resistance Antibacterial High capacity: 670g / M2 Flame retardant High quality galvanized perforated steel High porosity virgin extruded activated carbon 4mm. Specially designed to remove VOC. 66mm bed thickness. 400 CFM 6" fixed flange outside diameter: 9" Height: 28" (71cm) Weight: 28.6lbs Carbon bed width: 1.6" Pressure drop at max CRM 80pa/.75wg All PROfilter products come with a PREfilter included. All PROfilters have a Max Operating Temperature of 175°F. Recommended Fan: VTX600, S-600 FREE SHIPPING