ATCO Insulated Flexible Duct,10&WC

Flexible Duct; For Nominal Duct Diameter 4 in; Wall Thickness 2 in; Maximum Temperature Rating 180 Degrees F; Minimum Temperature Rating -20 Degrees F; Insulation Value R 6.0; Color Gray; Overall Length 25 ft; Duct Material Fiberglass; Jacket Material Polyester; Fire Rating Flame Spread: 25 Max; Smoke Developed: 50 Max; Maximum Pressure Rating 6 in wc; Maximum Air Speed 5;000 fpm; Vapor Transmission 0.6 Percent