For kitchen and bath fan venting.. Vents moisture and odors to the outside Low profile flush mount design Mounts easily under soffit Adapts to 3-in and 4-in round exhaust duct Color/Finish Family: White Manufacturer Color/Finish: White Length (Inches): 5.25 Rough Opening Length (Inches): 1 Weight (lbs.): 0.24 Width (Inches): 5.25 Material: Plastic Net Free Area (Sq. Inches): 7.75 Package Quantity: 1 Rough Opening Width (Inches): 3.75 Warranty: 1-year limited CA Residents: Prop 65 Warning(s): No UNSPSC: 40101500