Stamping Galvanized steel duct corner 30mm Uesed for HVAC duct accessories. Welcome to inquiry the details! We also have 15mm, 20mm, 25mm, 30mm, 35mm, 40mm duct corner. Their thickness is 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm and 5mm, You can choose as your require. Duct corner system is a saperate flange install onto ductwork. They are used for industry, home, electric appliance, building, engine Project. We are a Stamping factory that from China, our stampings are drum closure, pipe clamp, barrel clamp, bracket, TV bracket, LED TV bracket, Duct corner, duct flange, drum cap, drum ring clamp and U clamp
