This 4 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 won't collapse, sag or bunch up. Flexible enough for easy installation.

Product Features:

• Be sure to clean ducts over time for optimal appliance performance
• For multiple uses dryer, bathroom or kitchen venting
• Semi-rigid but flexible for easy installation
• Fire resistant and non-crimped
• Can be cut to length of specific venting application