Fitting, 90 Degrees Elbow, Duct Size 9 In, Width 11 In, Height 11 In, Inlet Diameter 9 In, Outlet Diameter 9 In, Material of Construction Steel, Gauge 26, Coating Galvanized, Adjustable ' Features rolled ends to accept Quick-Clamp Duct fittings. The main function of the sealant is to seal air. Description Heating & Cooling Products Adjustable Elbow, 9 in, 90 deg, 26 ga, Hot Dipped Galvanized Steel G Duct Size: 9 Outlet Diameter: 9 Inlet Diameter: 9 Diameter: 9 Width: 11 Height: 11 Gauge: 26 Country of Origin (subject to change): United States 9 90 Deg. Elbow Round Duct Fitting 26 Ga Stainless Steel Duct Outlet 12" 90 Degree Adjustable Elbow - HVAC Duct Eblow 26 Gauge Hvac 9 90 Deg. Elbow Round Duct Fitting 26 Ga Steel Master Flow 9 in. 90 Degree Adjustable Elbow 90e9 90 Adjustable Round Elbow Duct - Aluminum Bend Tube 90 Degree and Gi... Inside may have duct sealant that is not applied by a machine and may look messy. press formed elbow constructed from heavy-gauge steel with gradual turn to minimize air resistance.