Insulated flex duct, For Nominal Duct Diameter 6 in, Outside Diameter Not Applicable, Wall Thickness Not Applicable, Maximum Temperature Rating 200 Degrees F, Minimum Temperature Rating -20 Degrees F, Insulation Value 6, Color Silver, Overall Length 25 ft, Duct Material Fiberglass, Jacket Material Metallized Polyester, Fire Rating Less than 25 Seconds, Maximum Pressure Rating 10 in wc, Maximum Air Speed 6,000 fpm, Vapor Transmission 0.05 Percent