... Flange,Duct Profile,TDC Flange - Size:20 / 25 / 30 / 35 mm - Material: Galvanized Steel, Stainless Steel Duct Flange,Duct Profile,TDC ... Flange Duct Flange Of Galvanized Steel Octopus Metal Co., Ltd is ... through a complete supply chain. 1) Material: Galvanized Steel, Stainless Steel 2) Available in zinc coating: 80g,m² - ...