Broan 413 3-1/4" x 10" to 8" Round Duct Transition, NA 8 In. Round Transition for Range Hoods and Bath Ventilation Fans; Width 10.600; Depth 8.250; Weight 2.00; Color 0; Operating System; Batteries Included; Batteries Required; Number of Batteries 0; Battery Type N/A; Language English; Assembly Required 3.25 in. x 10 in. to 8 in. round transition made to fit fan and hood outlets that must fit to 8 in. round ducting Transition is made of 30 gauge galvanized steel construction for durability and long life 1-piece design for easy installation Height 8.310