Zephyr Zephyr 7 Inch Round Back Draft Damper with Foam Seal for Vertical Applications

Features:The perfect complement to any new ventilation system or upgrade, this unit prevents unwanted outside air from entering your kitchen.A foam seal built into the damper provides positive closure.Designed for vertical ducting applications.Not for use with dryer ventilation systems.Specifications:Duct Size: 7"Diameter: 7"Depth: 7"Material: Galvanized Steel