The IMPERIAL 4-in 30 Gauge Galvanized steel Round Adjustable 90 degree Duct elbow is a high-quality and durable component for HVAC and refrigeration systems. Made of galvanized steel, this 90 degree elbow is designed for use with a nominal duct diameter of 14 inches. With adjustable features and a pressure rating of 3" W.G, it is suitable for the Greenseam Duct system and is built to last. The silver-colored elbow comes from the trusted brand Greenseam and is a reliable addition to any industrial or commercial setting requiring a 90 degree elbow component.