Hose, Machine, Flanged Duct Connectors | US Duct
10" Flex Duct Connector - HVAC Ductwork Sheet Metal - Indoor Comfort Supply
WhisperValue® DC™ 24 Gauge, fire code rated, 4" oval to 3' round | Crescent Electric Supply Company
GE RAK6053 Duct Adapter for GE PTACs
IMPERIAL 4-in dia x 3-in dia Duct Reducer in the Duct Reducers department at Lowes.com
Duct Inline Reducer Increaser Connector to Vent Adapter 3 4 5 6 Inch // 80-150 mm - - Amazon.com
Two Way Duct Adapter
8 Inch to 6 Inch HVAC Duct Reducer & Increaser - Galvanized Sheet Metal Ducting Connector for Airflow, Heating, Cooling, & Air Ventilation System Extra Strength and Fittings - Air Tool Fittings - Amazon.com
Snap-in duct adapter for 4" ducting
HVAC Tapered Duct Reducer - Galvanized Steel | FAMCO
FAMCO Duct Increaser/Reducer - Galvanized Steel | FAMCO
L.B. White 16 in. Duct 2 to 1 Adapter Kit for Foreman 500 & 750 - John M. Ellsworth Co. Inc.
Air Duct Adapter For 120mm Case Fan 4" and 5" Output – The House of Hydro
Dayton 6WZP3 $30.70 Round Duct Connector, 8In, Galv Steel | Zoro.com
Made in USA - 5" ID, Galvanized Duct Flange Adapter - 03233657 - MSC Industrial Supply
B3620 Duct Adapter
Duct Reducer - Southwark Metal Mfg. Co.
16x12 Round Duct Reducer 16" to 12" Adapter | eBay
Snap-in duct adapter for 4" ducting
FV-VS43R - Panasonic FV-VS43R - WhisperValue 4" Oval to 3" Round Duct Adapter
NORDFAB Reducer: 10 in x 4 in Duct Fitting Dia, 12 in Duct Fitting Lg - 40D560|8040025887 - Grainger
8 X 5 Vent Pipe Reducer - HVAC Ductwork Sheet Metal - Indoor Comfort Supply
Rheem Outlet Duct Adapter - GP Conservation
Round Duct Connector, Model RDC-8, 8 In Dia, For Models SP/CSP, Product # RDC-8 | Greenheck
