Broan T460 Transition 3-1/4" x 14" to 7" Round Vent Hood Duct Transition; Height 8.800; Width 14.300; Depth 7.700; Weight 1.30; Color 0; Operating System; Batteries Included; Batteries Required; Number of Batteries 0; Battery Type N/A; Language English; Assembly Required Compatible with Broan and NuTone 3-1/4 in. x 14 in. rectangular and 7 in. round ducts Provides a transitional connection between a 3-1/4 in. x 14 in. rectangular duct and a 7 in. round duct 30-gauge galvanized steel construction provides longevity Used for outdoor venting applications