Lambro Silver 4" x 25' Foil Flex Duct (414)

Lambro's flexible aluminum/aluminum foil flex duct is ideal for applications where building codes require use of all aluminum duct. The duct has a maximum operating temperature of 250°F. Ideal installations include bathroom fan venting and general exhaust applications. This duct is not to be used when venting a dryer, as a UL2158A transition duct is required for that application.