NuTone NuTone 3" or 4" Round Duct Aluminum Wall Cap with Damper

3" or 4" Round Duct Aluminum Wall Cap with DamperFeatures: Aluminum with spring operated weather louverFor 3" or 4" round duct3" to 4" transition includedBuilt-in bird screenSince the beginning in 1936, NuTone has pioneered many of the product innovations now established as standards of the industry. In 1998, Nortek acquired NuTone, adding it to the Broan Group. Today, Broan-NuTone carries on the commitment to provide the finest products in the industry.