Nautilus Premium Bath Fan Rough Dimensions: 8 X 8-1/4 X 5-3/4 Plastic Grill: 9-1/2 X 10-1/4 110 Cfm, 4.0 Sones Fits 4 Round Duct, Damper/duct Connector Included Centrifugal Blower 4 Pole Motor Built-in Mounting Ears Torsion Spring Grill Mounting Boxed Discovery Hwu All items sold new in original packaging