... / 30 / 35 mm - Material: Galvanized Steel, Stainless Steel Duct Flange,Duct Profile,TDC Flange Duct Flange Of Galvanized Steel Octopus Metal Co., Ltd is ... -clamp -----TDF duct connection: corner, cleat -----Other: Duct hanger, thread rod, self Adhesive hanger, gasket We offer customized production according to your ...