- Brand: Southwark Metal Mfg.Angle: 45 DegreeApplicable Standard: ACCA, SMACNAFrame Size: 28 Inch x 10 InchItem Type: Shortway, Vertical, Square ThroatMaterial: Hot Dip Galvanized SteelSize A: 28 Inch x 10 InchSize B: 28 Inch x 10 InchItem: Duct Angle