Broan-NuTone® 634M Steel Roof Cap for 6-Inch Round Duct with Backdraft Damper and Bird Screen, Black Carbon Dioxide depending on what was detected

depending on what was detected

1/2 and 9/16-Inch nut drivers

ergonomically molded grips allow for increased comfort and reduced fatigue

Delivering square cuts with minimal burrs

With up to 400 lbs

Broan-NuTone® 634M Steel Roof Cap for 6-Inch Round Duct with Backdraft Damper and Bird Screen, Black Carbon Dioxide depending on what was detectedBroan NuTone 634M Steel Roof Cap for 6 Inch Round Duct with Backdraft Damper and Bird Screen, Black The attractive Broan 634M roof cap is the perfect finish for your ventilation system. The built in back draft damper eliminates cold air from entering the home. The bird screen stops unwanted visitors from gaining entry. Specifications INSTRUCTIONS