... Rectangular Duct and Fittings 2 - Duct Connection: Flange, Corner Flanges, HVAC Duct Accessories, Transversal Flange Flange Octopus Metal ... through a complete supply chain. 1) Material: Galvanized Steel, Stainless Steel 2) Available in zinc coating: 80g,m² - ... Reducers etc. -----TDC duct connection: flange, Corner, G-clamp -----TDF duct connection: corner, cleat -----Other: Duct hanger, thread rod, ...