Broan-NuTone 639 Wall Cap, Steel, Black, 3-1/4 x 10 Duct

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. Features: For 3¼" x 10" duct Spring-loaded backdraft damper and bird screen 24 GA CRCQ Steel, black powder coat paint finish Do not use for dryer venting