The DEFLECTO PEVENFO450SF Supurr-Flex duct is a 5-ply aluminum flexible duct designed for various venting applications. Primarily intended as a dryer transition duct, its construction offers superior fire suppression capabilities. Beyond dryer use, it can be integrated into bathroom ventilation, general-purpose venting, and HVAC systems where a flexible, durable duct is needed. The duct provides a maximum air velocity of 4,000 FPM and operates within a temperature range of 0°F to 265°F. Supplied in a 50-foot nonretail bulk length, it compresses for easier transport and storage.