... :2004 Galvanized Rectangular Duct Rectangular Duct, rectangular ducting,rectangular air ductWe produce:---Rectangular duct and fittings: Elbow, Transitions, Branches, Reducers etc.---TDC duct connection: flange ... , Corner, G-clamp---TDF duct connection: corner, cleat---Other: Duct hanger, thread rod, self Adhesive ...