ATCO Noninsulated Flexible Duct,25 ft. L

Flexible Duct; For Nominal Duct Diameter 18 in; Wall Thickness 0.125 in; Maximum Temperature Rating 180 Degrees F; Minimum Temperature Rating -20 Degrees F; Insulation Value Not Applicable; Color Silver; Overall Length 25 ft; Duct Material Aluminum Foil; Jacket Material Not Applicable; Fire Rating Flame Spread: 25 Max; Smoke Developed: 50 Max; Maximum Pressure Rating 6 in wc; Maximum Air Speed 5;000 fpm; Vapor Transmission 0.05 Percent