639 Broan-NuTone Steel Wall Cap For 3-1/4" X 10" Duct With Damper & Bird Screen, Black

• Compatible with most 3-1/4 in. x 10 in. rectangular ducts
• Includes spring-loaded backdraft damper and bird screen to help Protect your ducts
• 24-gauge cold-rolled steel construction with an electrically bonded black finish Provides longevity
• Used for outdoor venting applications

Install Instructions
Specification Sheet

Select the Broan-NuTone 639 Wall Cap to Provide reliable wall ventilation. Features a black enamel finish and is designed for use with 3-1/4" x 10" duct. Includes a built-in back-draft damper, and Protective bird screen to prevent small pests from entering duct.