Product details:

This 8 inch diameter semi-rigid air duct is suitable for general air handling applications like exhaust venting, bathroom venting, range hoods, suspended ceilings and more. The metallic duct can be extended up to 8 feet in length, and can be cut to size for specific venting applications. The semi-rigid transition duct is fire-resistant and it wont collapse, sag or bunch up. Flexible enough for easy installation.